If you don't want someone to give an opinion, don't invite the opinion in the first place. Trouble is, everyone thinks their car and mods are the best thing ever (to them, they probably are), and so crave the adoration of their peers. Mostly it works as we generally here know what works, but sometimes it doesn't.
As I've said before, Silly Hat Rule. If you want to wear a silly hat then that's fine, but don't expect me not to tell you it's a silly hat if you post a pic.
I didn't say I didn't like the bumper, I said I didn't like the headlights :p