I guess we're both wrong, then. At least I'm ready to admit my response wasn't called for, but I had a reason. You see, it's not the first time someone tries to screw with me (and I'm not saying that was your intention), so when someone said to copy a file and that it would yeld a new FFB, but then I discovered that it actually changes the physics of the car, I imediately assumed you were just another (insert insult) trying to mess with me. All because you knew what the file did, and because didn't tell me.
So while my response wasn't the best, you could have been more clear about your intentions from the get-go. You could have said what the file does and could have stated we were experimenting. But, more specifically, you could have been more clear about the "party pooper" post.
I would have been more than OK with experimenting if your intentions were clear from the beginning. You cannot expect a regular user to pick up on these things, specially since the regular user in question had to dig up that your info was wrong and that it completely changed the cars' behavior. Anyone not used to messing with the sim would assume you had bad intentions, specially after the "party pooper" post.
In the end, I think it was just bad communication from both of us.