Oh wait, there is, it's called Trademark Law! As such, it's getting really old seeing a bunch of angry parties writing open letters and rants on social media trying to claim they're the morally superior party for [BS REASON HERE]. None of that matters. What matters are statutorily defined factors such as likelihood of confusion, levels of distinctiveness, date of first use in commerce, etc that set forth who gets to use a mark as a matter of law.
As such, it really doesn't matter what these MiSoft people tried to do in iTunes Connect, as Apple is/should not be the gatekeeper when it comes to naming disputes (see the handful of stories posted by app devs who are mad about takedowns). Nor does it matter if FiftyThree is particularly pouty that Facebook came in and tried to use their brand, because their original mark application really only has to do with stylus based drawing apps.
tl;dr: Nothing to see here until the parties in question actually lawyer up and assert infringement.