No - I think sometimes how appropriate someone's avatar is (for what I know of them from here) or sometimes - yeuch... but I;ve never actually coveted someone else's!
I agree totally boxtops a I'm a firm believer in individualism and loathe copycats that copy others avatars on purpose when billions if not trillions exist but I still wonder what the t&c's say about avatars as I can't seem to find anything about it.