"If things don't improve soon we will implement a registration-required policy and we will start removing post access for those that constantly have nothing positive to contribute to the forum. "

Why hope and wait for things to improve ?

Straightaway implement what you are planning to do as above.

Maybe only because of such irritants, I find almost all forums need a login to post. Hardly any of them permit posting by non-registered users.

You are doing great - so don't worry about these occassional problems.

Raghu