I think the problem hereis email and message forums are one of the WORST ways of relaying general feelings about a subject. Feelings are more expression and vocal tone based than sctripted. People need to watch what they say and how they say it if they are trying to get something accross that may be seen as something else. You seem to have been doing that often, and people can't decide how to take some of your posts until you reply back with a "That's not what I was trying to say..." type of reply.
I think a few people (including Tim's post) have said it best... the reason it seems people are on the defensive with you is because you don't even have your VX yet and you have put on a napalm of postings here in the last few weeks. In the post above (if you re-read it from a general point of view) it sounds like you are disbelieving about the other members factual info on the muffler and you may be trying to sway someone from buying it as well.
All I am saying is just look at what you write when posting and see if it really relays what you are TRUELY trying to say. I have gone back and edited my posts in the past because I thought someone may take what I said the wrong way... others have too.