Apple Computers were rightly sued by Apple (the music company, Apple Records?) as the computer company was getting in to the area of music.
The suffix -gram is already well known from "telegram" and adopted in to other 'message sharing via different media' situations: cookiegram, kissogram, etc..
The Apple case is a million miles from Littergram vs. Instagram. If they'd tried to create "Binstagram" there would be a case to answer ...
I consider the chance of actual confusion (which FWIW isn't actually the measure normally used to judge infringement) to be practically zero.
