I would very much like the option of having the P85-badge on my car. Cant see any problem for those not wanting it. Most car manufacturers give you a choice of "removing" badging at no cost when ordering a custom car from them. At least VW, BMW, Audi etc do so as standard.
Having the P85-badge would be nice for me at least, but I also like to see the AMG/M3/M5/M6/S4/RS4/Etc-badges on other brands performance cars. I simply feel it gives the cars some extra "oomph, oh yes I'm special"-feel as compared to the more standard motorised versions of the cars that looks more or less the same.. Most people dont recognize it, but the people in the know acknowledge it right away. I'm not going for the CF-spoiler since I like the look of the car better without it so there goes the only styling-cue visible on the outside of the car.