It might count as raiding their threads.
As for trolling, not really. Almost none of their threads actually say 'no small tops' in the first post, so it's fair to assume many people won't even notice that 'rule' hidden in the thread. Even if they did, I don't think that's a rule the OP can have enforced. It would mean to post Attack on Titan small tops for example, you'd have to make a new version of that thread with 'small tops allowed'. The mods don't want two threads for series/content according to the rules post, at least in general. Making 15 'small tops allowed' versions of all of the 'no small tops' threads is possible. Or we could ignore the 'rule' and just post small tops anyway. I think the mods would prefer the latter, and so won't ban people for 'trolling'.