Of course your prediction will come true, there's already a lot of evidence for it in the comments of most articles on the leak. Cheaters will be the victims and anyone who thinks cheating on one's spouse is bad will be considered insensitive.
How do you know the spouse's opinion on the matter? That's the only opinion that matters regarding how bad it is.
"Cheating" implies dishonesty and deception.
..Something I think that keeps getting lost in this discussion that inevitably turns towards discussions of polyamory - this is not a discussion about whether polyamory is okay, it's a discussion about whether it's okay to lie to another person who you've of your own free will promised that you will be monogamous with.