Do you tip on corkage fees?

Excuse me, but I'm curious about a social convention that I've been pondering lately. When it comes to dining out and choosing to bring your own wine, is it customary to also tip on the corkage fee that the restaurant charges? Some say it's already a service charge, while others argue that the staff still deserves recognition for handling the bottle. What's your take on this? Do you personally tip on corkage fees, and if so, what's the reasoning behind it?