I guess one of the differences between your average idiot and a good lolcow is this:
Your average idiot may not know when to quit, but at some point it will occur to them that they've lost the fight. They'll pack their shit and abandon accounts in favor of new ones that no one knows the name of, and start over fresh. Eventually. God knows how many times I've seen that happen.
A good lolcow, on the other hand, definitely never knows when to quit, and will never, ever stop responding to the trolls. Even if they don't post here anymore, even if they make their accounts as private as they can, they don't fucking shut up about it. It's always "haters this" and "trolls that" and "I'm going to file a lawsuit". They cling to their internet presence like they cling to the remaining shreds of their dignity.
So here's a different lesson I've learned: the more you fight, the more you lose. You already done fucked up. Pack your bags and get outta town, or stay and "fight" while everyone points and laughs, meanwhile googling your name results in three links to a thread that itself links to every black porn video you've ever commented on.