If that is the actual reason for blocking it, that's quite shitty. However..
If blocking any port shuts down your node, then you are too noob to be running one in the first place.
~BCX~
That pretty much sums it up. It literally takes 6 seconds to use a different port
As for nooks being noobs, I get that, but there's PLENTY of docs out there now
http://bfy.tw/1brr