Face Down In The Right Town

I know I probably really shouldn't judge people I don't know very well, but sometimes I meet someone (or in this case, a group of people) who I just get a bad vibe from. I've gotten bad feelings from people I don't know before, but not very often; they haven't done anything to me, but it's that weird feeling you get. Like I can see that they're genuinely bad people. That they're dodgy and seedy, and that I should run far far away from them.