That seems rash. The 'simplest thing' is a first-order approximation of a good thing. It could quash conversations, lock out users for days perhaps. And how can someone even talk about problems, if they're locked out? Catch-22.

At least measure the results, including people who give up and go away. It doesn't take much frustration to discourage even an active user with cogent remarks. I can see the quality taking a dive when regulars are driven away.