To a lawsuit. First you would have to show damage though. How many people who know you really think that because any of them said this here?
The reality is one would have to show damages to be able to successfully sue somebody for something like that. You are relatively anonymous because of the reality that the chances of somebody from your home town seeing a post on this site are pretty much nil, they'd then have to figure out who you are, then they'd have to fire you or something, tell your boss, etc. because they'd actually believe that the "accusation" were true...
At that point you'd have an actionable cause.