That sounds like more your mentality where you feel alienated because very few names you recognize are still around. Enter with a positive attitude like "Hey, some of these people might be pretty cool!" instead of a negative one, and it'll make a world of difference in how you view the places and the people who post in them. Also, quite a bit of the member base in those areas is over 18, and many of these people aren't hardcore anime fans, they just like Pokemon or still hang around because they like the community.
I feel maybe you should go check out the J-E Discussions thread in Japanese Entertainment. Since you seem to be pretty into various anime, that's the best place to discuss anime.
I'm just providing the rationale I see behind the staff's decision, which they had, as said in your thread, unanimously decided to remove the board because it was dead, probably due in no small part to VMs and the various DCCs that have sprung up across the forum.