To really do anything, you'd need to know which specific emails/interactions broke the rules, which would give people trying to find the very edge of acceptabil

To really do anything, you'd need to know which specific emails/interactions broke the rules, which would give people trying to find the very edge of acceptability useful information. "You're being TOS'd because your email titled 'Foo' on the 3rd of July breaks our spamming rules" tells you that your email titled 'Bar' on the 2nd didn't, and you know what you did differently between them and now you know how far you can push before being caught. It's a bad situation - ideally good actors could get useful feedback to help avoid accidentally crossing a line, but bad actors will absolutely abuse any kind of margin thy can find.