SouthWest onboard wifi MITM injected code

SouthWest airplane onboard wifi is running an MITM attack on every HTTP (but not HTTPS) site to inject below HTML code.
It will show then a bar on the top on every HTTP site.

<html lang="en">
     <head><link href="http://getconnected.southwestwifi.com/unb/unb.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="http://getconnected.southwestwifi.com/unb/jqr44-1.8.3.js"></script>
<script type="text/javascript">var r44_btime=new Date();var r44_smu_time=1438690708.864</script>
<script type="text/javascript" src="http://getconnected.southwestwifi.com/unb/unb.js"></script>