Once again reading your description of problem people in a WFH situation makes me wonder how good those same people are in the office. I don't have any evidence on this, but if someone is actively looking to shrink their workday to 4 hours then were they actually working in the office or bunking off in some other way? Wanting to work 2 jobs - I have actually seen people in the office who spend all their time with a job search browser window open. If they're a flame war monster at home are they behind social problems in the office?
WFH might not be appropriate for everyone, but perhaps those abusing it actually aren't nice people to work with in an office environment either.