It sometimes occurs to me that the people I'm racing with, very well could be smelly or criminal or have a third eye in the middle of their forehead, or who knows.
But really when it comes down to it... they can be sitting there in their custom racing cockpit with a big mustard stain on their shirt, or a smelly spitoon next to them, or wearing ladies' lingerie... on their head...
And it doesn't really matter as long as they race by the stated room rules and don't get nutballish or hysterical in the txt chat.
Of course that's why I generally make mics disabled in pub lobbies I host... With mics on it's a bit harder to pretend all the other participants are respectable & refined if you hear grunting, pooting, and belching over the mics during the race.
As for other things that are odd...
The people who join clean rooms with clearly incendiary PSN names.
I told one guy who wasn't dirty that I could see, just not that great a driver... but kept getting accused of doing things on purpose... His name was something along the lines of "trouble-maker" or something to that effect. I said
IT'S YOUR NAME!
Having a name like that, definitely increases the chances that the racer is dirty... OR at the very least, will increase the chances that people will assume any sloppy driving might be deliberate.
Having the word "dirty" in your PSN name is kind of a red flag.
Also having an incendiary auto-greeting message like, "here comes trouble" or "I'm here to tear it up", etc.
Or having an over the top arrogant win message as well tends to get people's dander up.
I used to wonder why otherwise normal people would make these mistakes. But then also, there's cultural issues involved. A phrase that might be considered lightly funny and good fun in Tennessee or California USA, might very well be taken the wrong way by someone in Scotland or Brazil.
I found this out when I said, "I want a grudge match" to someone who's in Europe, speaks English well but as a 2nd language, and well, if you don't know that's a joke among friends, it comes off sounding a bit hostile even though I didn't mean it that way!