Ignore (not /ignore because the list is too short) them if they start off abusive, unless that abuse really violates the TOS (extortion attempts, racist comments, etc.)

If they start off asking how you do it (which is what I get most of the time from people) just send them a link to this website. I often joke to people that "how I do it" is by using multiple keyboards, mice, and gallon drums of coffee to speed me up to the point where I can manage them all. A few people who started off freaked out by the sight of my stampede wound up become regular contacts down the road just to say hi with etc.