I don't understand the forum punishment, with a few assumption I made since I am not familiar with the server at all ..
IF this is in fact under the forum rule:
"Any extremely inappropriate or offensive material (i.e. pornography) will be removed and the offending accounts will be permenantly suspended."
Then IF those two guys evidently posted links to the pictures, and IF the pictures under the link are pornography (child p. is still porno). Then I see the rule is broken but the stated punishment was not served.
However, it will just be a forum ban. It doesn't hurt anything, one can create as many forum account as the person want. So I don't see the point of going on with that other than for justice and doing as the policy stated purposes.
As for in-game punishement served, given:
"Depending on the severity and impact of the harassment, the penalty can range anywhere from a warning to a permanent ban at the discretion of the Enforcement GM or Administrator."
It is up to the server's authority to decide on the punishment, third party shouldn't have any impact on that. Based on experience, it's hard to get a permanent ban handed to a harassment cases.
Still I agree with Reyl, when it involve nude pics of a 14~16 year old girl. This is a very serious child p. case. The girl (or her parents) should inform the police and arrest the first boyfriend immediately. Even now you can still get help from the police, with an IP or email address the FBI will find the guy out and put him to jail. Having/sharing child p. is already a criminal offense as far as I know. Those two guys who posted link to them, might also be the person to upload them. If the girl wanted to, she can get those two guys to jail (if they are in the US). That should be the real punishment in my opinion, compare to that, any forum ban or in-game ban is nothing.
(notice i use child p. for the obvious? sure because i don't want to attract any fans of child p. to come to this forum.)