Most findoms I've seen on twitter strike me as being genuinely heartless and screwed up in that they actually enjoy ruining people's lives and wrecking their marriages by revealing embarrassing photos to the sub's wife. Also, look at the attached photo- a findom enjoying the fact that her rinsing this sub means his kids are being affected. I wonder, would this findom also be ok with it if they weren't being fed properly because he didn't have enough money? She probably would. These findoms are genuine sadists who actually seem to view their slaves as worthless. They think it's okay to ruin their lives and other's lives because they have out-of-control sexual urges.
These findoms don't care at all about their slave's welfare, but some findoms justify extreme rinsing by saying "he's doing it because it's what he wants, it turns him on". But the thing is, you can still be turned on by something and wish it stopped at the same time. The slave may not be able to stop it, in the case of blackmail.
If this looks like I'm arguing against findom itself, I'm not. I'm arguing, mainly, against the twitter findoms that ACTUALLY seek out to ruin people's lives and think that's okay.
This is my opinion, but I'd be interested to hear what findoms on here have to say about it.