I don't think that the issue is limited purely to the fact that people have the word "Demo racer" under their name. I've recently been on the receiving end of abuse from forum users, for what I believe to be no other reason than my low post count.
It appears that because I haven't been a member of the community for a long time, and my post count reflects that, I'm an idiot with no basis for posting an opinion. I'm also not allowed to disagree with others that have a high post count, or I'll get proverbially nailed to the cross. It also appears to be fair to assume that because I have a low post count, I haven't read the thread fully, and aren't qualified to contribute to the thread.
I've bitten my tongue on a number of occasions, because of some outright blatantly rude and offensive things being aimed at some people, because they either have the word "Demo racer" under their name, or they have a low post count. I'll share another example of this, right here:
http://www.lfsforum.net/showthread.php?t=46996
The amount of abuse that the OP receives, is completely unreasonable.
It's also not fair to assume that because someone doesn't meet other people's seemingly high expectations of humanity, they should be subjected to the gang-banging that is becoming more prevalent on these forums. People need to stop forgetting that there are indeed pre-teen and non-english speaking humans using these forums, which is why their grammar, spelling an language doesn't meet their requirements.
It's not a phenomenon that's limited to these forums by any means - there's so many thousands of forums out there that suffer from the same childish elitism. Just do a google search for "forum post count", and see how many requests there are on various forums to have them turned off, for exactly the same reasons as people have stated here. Having a "Demo racer" tag, while different to read, results in the same attitude from others.
It's sad, that I make a post like this, just one month after buying myself into an S2 license. I love playing LFS online with good racing and gentlemanly conduct, but it seems that these forums, increasingly, don't reflect this ideal that I've found in the driving seat.