What unintended target(s)? In PvP there are not any incidental nearby enemies that aren’t your intended target(s) -> all players that are not in your faction and are thus enemies are your intended targets!
imagine if my quell (interrupt) hit everyone in a 5yd range.
everyone not being targetted by me for that interrupt, is an unintended target.
bioware is simply clarifying their position, of how they view this ability, and how they want it to perform. you don't have to agree with it, but that's their position.