Grumbling about work...

Why do stupid people call in to tech support on a weekend, ask that their case be sent to a new engineer because the existing one isn't working weekends, and then be unreachable for the rest of the day? I mean, what's the point? You're still not getting anything done, and all you've done is to make sure when you pick up Monday, you're going to be working with whoever had been around Saturday instead of the engineer already working with you and knows your setup!