I keep a Jerk List at work.
It's a list of customers who are, without a doubt, jerks.
A jerk is someone who doesn't know what they're doing, they respond to questions with vicious outbursts instead of helpful answers, blame technicians for mistakes they made themselves, demand refunds for even the smallest spelling error in a ticket response, and they do everything in their power to ensnare the technicians into administrative tasks.
If you ran a store and had to deal with one of these jerks, you'd hand them their money back and tell them "You're trespassing. Get off of my property. Now."
Their names are pretty well known, because techs will say their name, and others will sigh or groan or laugh and mutter something.
Me, I mutter "Jerk."
Every so often, I wander through the Jerk List to see if any have canceled.
When one cancels, I breathe a sigh of relief. I also ping the main domain to see who they're being a jerk to now.
When one appears to have added a sub-account for an administrator they've hired, I smile. The jerk can be a jerk to the admin, and the admin can come to us with legitimate issues.
When one starts entering more tickets because they've bought more servers they have no idea how to run, that's when I die a little inside.
I'm looking at this Jerk Ticket right now.
He needs something. And, oddly enough, it's not something that involves doing his work for him.
But he hasn't given me enough to act on.
I ask him a question as plain as I can make it.
Sure enough, responds in a tone that cannot be read in any way but nasty.
*sigh*
Jerk.