If you don't think the topic is worthy of discussion then you have the choice not to post in the thread. Others clearly do and for obvious reasons I think Robinson's tenure is still very relevant..
Your comparison to threads about managers who've not been at the club for years is hardly fair.
My point is mods shouldn't be touching threads unless they have broken forum rules. Let the members decide what's worthy of discussion. and if they are not threads will naturally fall down the board and disappear.
The forum us hardly bustling with traffic. Culling popular topics because you might not agree with them seems like a strange decision.