I believe it's a growing problem of people spamming topics with pointless replies "good job bud" "congrats" and things like that. I feel that in order to reply to a topic, you should at least have something meaningful to say. There's a hook for a 20 character limit that I have as well if you need it [member=Bullet]
I'm not really feeling this either. Spam is spam but we shouldn't require more of the members that do follow the rules then we already do. I feel like adding 20 characters limit would cause people to do stuff like "thanks 20202020" or "thanks hjsksk." And really that just makes it worse. Always got that report button if not caught.