Heya -- thanks for keeping an eye out, but if it was just a forum (and not the whole website) there's no problem with linking to it. Links are fine so long as there's a warning if there's something like pornography/tons of cussing/etc on them, and so long as porn images themselves aren't posted.
(I know this is a little foggy, but basically if you're linking to something because it's funny and it happens to have something TOS-violating on it [like an advertisement -- if the TOS stuff is less than one third or so of the page it's fine], so long as you give a warning you can still post it.)
If you ever have a question about something, you can always send it to a mod or an admin first to check.