Within 24 hours of pasting to your pastebin, I get 3 to 10 hackers trying
to login to my switch with common usernames and passwords as well as
generated ones. Granted that is not a true "port scan", but it conveys the
seriousness of the problem. I now have Class A 3 ip domains in the middle
east complete blocked in my iptables because I have no customers there.
It's entirely possible (and likely) this is entirely unrelated to any pastebins you might have posted.
I see such attempts every single day (which all get rejected)... it's pretty standard given the number of botnets out there scanning for insecure VoIP servers to exploit and abuse. Unless they're specifically targetting someone they're just going to be trying random IPs, not checking out a list.
IPv4 address space is small enough that it's trivially easy for a botnet to just pick a random IP to start from and then walk though every possible IP from that point. CPU/bandwidth isn't an issue since it's not the attacker's own, and the botnet means it's parallel enough that it doesn't take prohibitively long either. While grabbing pastebins might get them a few IPs which serve SIP they're not automatically going to be insecure, so walking the address space is likely to be far more fruitful.
Sure you can sanitise your pastebins if you want to, but if your server is insecure it's insecure and they're going to happen upon you anyway. I'd spend the time you saved replacing IPs with 'x.x.x.x' by securing your setup (never use default passwords, setup firewalls appropriately, etc) and configuring fail2bin instead (I know you said you already have Sean - that was more generic advice for anyone).
-Steve