Joe, personally I can't fault anybody for making upgrades to their car. I think the issue is what people consider an "upgrade". I used to do alot of shows with my son and it got to the point where I stopped saying anything outloud about somebody elses decisions. My son started getting to where he would walk up to a car with me and say "ok what's wrong with this one?" I started to see where it was affecting the way he looked at cars. He's a very smart and creative kid and I didn't want it to effect the way he looked at things. Much as I hate to see some of the things people do to their cars I have the option to walk away.
For the most part I try to make "upgrades" to my car that can be reversed if need be. But I wouldn't want to put limits on my efforts either. I mean if I could afford the new fuel injection unit and I thought it would be a cost effective improvement, I don't think I would hesitate. I'll bet there would be 10 people that would say that's a cool setup but there would be one or two that would say that's not the way it should be. I just installed a Vintage Air kit in my non ac car. Is that bad? It's a bolt on. It's not a factory ac. Will I enjoy it just as much when it hits 100* in the summer, hell yeah!!! And I'll make no apoligies for it either. Same with the panhard rod I just put on the rear or the rear swaybar(they never came stock). Same with my 400 in a 350 car. IMO it's a judgement call an who's to say my judgement is better than anyone elses but me?