That's where you draw the line between "fair use" and "abuse". IRL such thing is called common sense.
After if you're just posting to contradict people just to try to make a point because you think your opinion prevails, then be happy with it.
What we're seeing these days is not the guy who help himself plvl the wife or himself with the help of another account, it's parties of people in the same ls abusing loopholes. I'm sure SE didn't -- never-- meant to have such thing happen AND it's bad rep for them when something like this happens too. So instead of blaming/flaming the OP for pointing that loophole out, flame the abusers who are using a older than old loophole in MMOs.