I never said that this was a joke, funny, not vandalism, or even not a horrible thing to do. Your example of a person losing their job over this is a good argum

I never said that this was a joke, funny, not vandalism, or even not a horrible thing to do. Your example of a person losing their job over this is a good argument that harm can result from this kind of vandalism. However, I do think there is a distinction between an event causing someone to lose their job and their boss making an incorrect assumption about an event(in this case, that their employee actually posted an untoward message) and firing them. It's still horrible to break into someone's account and cause "them" to say something which will cause them to lose their job, but the vandal is not the only one at fault in that situation. No employer should fire someone for a post on facebook that appears to be written by them without first at least making sure. Realistically, they might. Regarding the case of a married person, if you don't trust your spouse enough to know that they're not having anal sex with some other man, or at least enough to consider that less likely than that their account was compromised, you shouldn't be married to them.