Dave,
That fact that I chose to join in is entirely up to me but I do fully understand it is trivial to the extreme.

I do not find it trivial to be falsely accused of nasty things.
I find it deeply offensive, and I doubt that many people would find it "trivial in the extreme" either.

I think most people would find such behaviour despicable, and question the motivation of those doing it.

Instead of suggesting I ignore it you should stop doing it yourself and suggest that your friends stop too.