I'm an ol' skool riceboy and have come to disagree with placing other manufacturer emblems on cars. I'd see Toyotas with VTEC stickers and TRD stickers on Dodge Avengers, etc. Now I'm seeing "turbo" emblems on the Prius and other ridiculous things. I understand to each his/her own but I've always had a negative connotation with that because of all the fun I've seen people (including myself) poke at poseurs like that. It's just fake and really doesn't look good, imo.
But this is just my opinion, so please take it with a grain of salt.