Nope. It would entail some custom coding in order to do the necessary checks, then hide the corresponding "vote". As it's been a while since I've done any serious modifications under the hood with XF, I'm not sure what the end result would be on server resources, but gut feeling says it's not something I'd consider doing. We'll see what the tech guys say as far as whether it's easily attained or not without adding considerable loads to the system.