I join in on some of the games threads, but I do agree there are a huge number of them these days - 15 in the Active list at the moment, and I have seen as many as 20 sometimes.
I remember when games threads were in the Other Subjects forum. From memory, I think there were about 8 or 10 games running at a time. Then the dedicated Games forum was created and it all went a bit crazy!
And yes, whilst I agree that it is separate and people can go to other forums if they wish to ignore the games, the fact remains that the games threads are rather dominating the Active list, so I can understand people getting a bit fed up with them if games are not their thing.
Still, they are obviously very popular, so there's little to be gained from complaining about them. You might as well join in, safe in the knowledge that they won't be appearing on Facebook or Twitter any time soon