He can trivially use "that" thing to post text on the internet. Should be even easier than tapping stuff inside x mobile app.

> Should be even easier than tapping stuff inside x mobile app.

I wouldn't know, I don't use it.

Also, wouldn't know if he was on the mobile app rather than website. Which I also don't use, because I don't use X.

But it's up to him what he does, the mutual dislike you and I have of X has no sway over him.