I think you are judging them. But who is to say that is something wrong. We judge things all the freaking time...it is a trait that you learn to use to your advantage. Thats my take on it. If it was a white group of kids dressed in polo shirts and Khakis asking the same thing using perfect English, I still would be a little wary just for the fact that they are asking me if my car is modded. Around here, people who asks for your mods is probably eyeing out for something they want. Sure I could be wrong, but better safe than sorry.

Or this whole thing can be innocent and they are just car enthusiasts.