To be fair, maybe one of them Visited Alcatraz at a visit, I doubt the post was Coherent, probably a drunk post.
As for wanting proof and violating privacy.
Tough. If she is cheating then yes, you do need proof.
If a man goes into a divorce hearing to leave his wife because he thinks she's cheating on him. He will lose everything and be branded a paranoid loser who doesn't know the meaning of trust.
If a man has proof his wife is cheating, he can gain a much better financial settlement as now he's not a paranoid loser who doesn't know the meaning of trust, he is someone who had his trust abused. It is still likely to be against his favour (gender equality is still absent from the court), but far less so.
The marriage is over, the question is do you end up living in a dumpster because your wife cheated on you, or do you get at least some of your lifes work in your name?
Half of that is a sales pitch, other versions include wives who want to ensure their husband ends up a penniless vagrant.