false-positive

abhi@tremblerz:~$ nc google.com 1-100 -uzv
Connection to google.com 1 port [udp/*] succeeded!
Connection to google.com 2 port [udp/*] succeeded!
Connection to google.com 3 port [udp/*] succeeded!
Connection to google.com 4 port [udp/*] succeeded!
Connection to google.com 5 port [udp/*] succeeded!
Connection to google.com 6 port [udp/*] succeeded!
Connection to google.com 7 port [udp/echo] succeeded!
Connection to google.com 8 port [udp/*] succeeded!
Connection to google.com 9 port [udp/discard] succeeded!
Connection to google.com 10 port [udp/*] succeeded!
Connection to google.com 11 port [udp/*] succeeded!
Connection to google.com 12 port [udp/*] succeeded!
Connection to google.com 13 port [udp/daytime] succeeded!
Connection to google.com 14 port [udp/*] succeeded!
Connection to google.com 15 port [udp/*] succeeded!
Connection to google.com 16 port [udp/*] succeeded!
Connection to google.com 17 port [udp/*] succeeded!
Connection to google.com 18 port [udp/msp] succeeded!
Connection to google.com 19 port [udp/chargen] succeeded!
Connection to google.com 20 port [udp/*] succeeded!
Connection to google.com 21 port [udp/fsp] succeeded!
Connection to google.com 22 port [udp/ssh] succeeded!
Connection to google.com 23 port [udp/*] succeeded!
Connection to google.com 24 port [udp/*] succeeded!
Connection to google.com 25 port [udp/*] succeeded!
Connection to google.com 26 port [udp/*] succeeded!
Connection to google.com 27 port [udp/*] succeeded!
Connection to google.com 28 port [udp/*] succeeded!
Connection to google.com 29 port [udp/*] succeeded!
Connection to google.com 30 port [udp/*] succeeded!
Connection to google.com 31 port [udp/*] succeeded!
Connection to google.com 32 port [udp/*] succeeded!
Connection to google.com 33 port [udp/*] succeeded!
Connection to google.com 34 port [udp/*] succeeded!
Connection to google.com 35 port [udp/*] succeeded!
Connection to google.com 36 port [udp/*] succeeded!
Connection to google.com 37 port [udp/time] succeeded!
Connection to google.com 38 port [udp/*] succeeded!
Connection to google.com 39 port [udp/rlp] succeeded!
Connection to google.com 40 port [udp/*] succeeded!
Connection to google.com 41 port [udp/*] succeeded!
Connection to google.com 42 port [udp/*] succeeded!
Connection to google.com 43 port [udp/*] succeeded!
Connection to google.com 44 port [udp/*] succeeded!
Connection to google.com 45 port [udp/*] succeeded!
Connection to google.com 46 port [udp/*] succeeded!
Connection to google.com 47 port [udp/*] succeeded!
Connection to google.com 48 port [udp/*] succeeded!
Connection to google.com 49 port [udp/tacacs] succeeded!
Connection to google.com 50 port [udp/re-mail-ck] succeeded!
Connection to google.com 51 port [udp/*] succeeded!
Connection to google.com 52 port [udp/*] succeeded!
Connection to google.com 53 port [udp/domain] succeeded!
Connection to google.com 54 port [udp/*] succeeded!
Connection to google.com 55 port [udp/*] succeeded!
Connection to google.com 56 port [udp/*] succeeded!
Connection to google.com 57 port [udp/*] succeeded!
Connection to google.com 58 port [udp/*] succeeded!
Connection to google.com 59 port [udp/*] succeeded!
Connection to google.com 60 port [udp/*] succeeded!
Connection to google.com 61 port [udp/*] succeeded!
Connection to google.com 62 port [udp/*] succeeded!
Connection to google.com 63 port [udp/*] succeeded!
Connection to google.com 64 port [udp/*] succeeded!
Connection to google.com 65 port [udp/tacacs-ds] succeeded!
Connection to google.com 66 port [udp/*] succeeded!
Connection to google.com 67 port [udp/bootps] succeeded!
Connection to google.com 68 port [udp/bootpc] succeeded!
Connection to google.com 69 port [udp/tftp] succeeded!
Connection to google.com 70 port [udp/gopher] succeeded!
Connection to google.com 71 port [udp/*] succeeded!
Connection to google.com 72 port [udp/*] succeeded!
Connection to google.com 73 port [udp/*] succeeded!
Connection to google.com 74 port [udp/*] succeeded!
Connection to google.com 75 port [udp/*] succeeded!
Connection to google.com 76 port [udp/*] succeeded!
Connection to google.com 77 port [udp/*] succeeded!
Connection to google.com 78 port [udp/*] succeeded!
Connection to google.com 79 port [udp/*] succeeded!
Connection to google.com 81 port [udp/*] succeeded!
Connection to google.com 82 port [udp/*] succeeded!
Connection to google.com 83 port [udp/*] succeeded!
Connection to google.com 84 port [udp/*] succeeded!
Connection to google.com 85 port [udp/*] succeeded!
Connection to google.com 86 port [udp/*] succeeded!
Connection to google.com 87 port [udp/*] succeeded!
Connection to google.com 88 port [udp/kerberos] succeeded!
Connection to google.com 89 port [udp/*] succeeded!
Connection to google.com 90 port [udp/*] succeeded!
Connection to google.com 91 port [udp/*] succeeded!
Connection to google.com 92 port [udp/*] succeeded!
Connection to google.com 93 port [udp/*] succeeded!
Connection to google.com 94 port [udp/*] succeeded!
Connection to google.com 95 port [udp/*] succeeded!
Connection to google.com 96 port [udp/*] succeeded!
Connection to google.com 97 port [udp/*] succeeded!
Connection to google.com 98 port [udp/*] succeeded!
Connection to google.com 99 port [udp/*] succeeded!
Connection to google.com 100 port [udp/*] succeeded!