You could just ignore what you deem to be "stupid posts"... instead of commenting in the threads thereby keeping them alive.
Do what you like mate If you know how, attempt writing a custom profile for AV to make it less obvi that you're a bot!
On a more serious note, people are free to post what they want as long as it doesn't go against our rules. Keep in mind that botting on an AV weekend can be dangerous as there will be A LOT more bots during this time and there is an increased chance for a ban. Depends if you think the rewards outweighs the risk.