Like most people I had never heard of this incident until I read the article and sever years after the event I cannot believe people (well OK its a stretch to describe liberals and feminists as people but I can't be bothered thinking of an alternative,) are still getting worked up about it.
I don't know anything about Channing Tatum, he's just a name, but in UK Emma Watson has a reputation for being so far up her own arse she'll only see the light if her throat is cut so probably the best thing to do is ignore them both.
American society might have divided into prudes and pervs but during a short walk along any Mediterranean beach in summer you will see much more than Tatum was showing, on both males and females.
If you don't like what's on show the trick is just don't look, which ascording to some less biased tellings of this story found in my DuckDuckGo search, is exactly what Ms Watson did.
But tell it that way and there is no trigger for faux outrage.