Why not? Would be very helpful if you could elaborate, so we can all learn something.
http://upload.wikimedia.org/wikipedia/commons/9/94/New100fro...
You would collect a lot of them from your customers or via an acquisition.
And if it wasn't for my own count next to my username, I likely wouldn't know how many upvotes I had.
I think the biggest draw for a lot of us is the pure simplicity in the site as it is.