Complete And Utter Computer Lockdown

shell.exit()
local oldPrint=print
local oWrite=term.write
local oTerm={}
local oldQ=os.queueEvent
for k,v in pairs(term) do oTerm[k]=v end
function print(...) local n=... if n=="Goodbye" then return nil end return oldPrint(...) end
_G.term=term
os.pullEvent=os.pullEventRaw
local msg="This computer has been locked down by Mudkip's Locker."
oTerm.clear()
oTerm.setCursorPos(1,5)
oWrite("U JUST GOT TROLLLLLED!")
function coroutine.yield()
oTerm.setCursorBlink(false)
oTerm.setCursorPos(1,19)
oWrite(msg)
oTerm.setCursorPos(1,20)
oldQ("")
return coroutine.yield()
end
error=coroutine.yield
os.reboot=coroutine.yield
os.shutdown=coroutine.yield