They probably aren't ignoring you. Some people probably are holding a grudge because some people on these forums just aren't the nicest people around. But I almost never see you post (in fact this may be the first time,) so I'm certainly not ignoring you at least.
Besides, even if they were ignoring you, look at it this way-
Maybe in the past you didn't care what people think of you and now you do, that's fine. But on an online, hostile forum for some lego game, it's really not a big deal if people don't like you all that much. Don't let something as small as that bother you. If you should be worrying about anything, it's real life relationships.