If you had the power, what one current celebrity (only one, sorry) would you completely and perfectly banish from the entertainment industry? That would be no movies, songs, TV appearances, celebrity gossip, not even having their name mentioned in a public forum, just as though everyone suddenly forgot they existed.
I’ll stipulate that the former celebrity wouldn’t be harmed physically, legally, or financially (other than lost future revenue). This IMO would also limit the reasons for the banishment to ones that are entertainment-related. You may well want to punish Lindsay Lohan for her jewelry theft and DUI, but the courts are already handling that. This theoretical ostracism would be for her real crimes: Speak and Herbie: Fully Loaded.
I’ll keep my pick to myself for awhile (he’s a comedian turned non-lead TV actor), and also note that unless they state otherwise, SDMB posters (including myself) are not celebrities, so they aren’t eligible.
Geraldo Rivera. There’s no shortage of annoying, vapid, narcissistic, attention whoring celebrities, but he’s one of the few who actively harms people (Satanic Panic, giving troop positions in Iraq, the “that guy lives there” stunt in Afghanistan this week, etc.).
Jessica Simpson. She’s tried it all (acting, singing, reality shows) and showed no talent in any of them. Yet she’s a mainstay on the covers of supermarket checkout magazines. Buh-bye.