I love how people spending $100 on multiple accounts, taking the time to level each one, and then playing them simultaneously is unfair...
But nobody complains about how some people spend $5000 on a high end gaming PC with VR and high end HOTAS setups with commercial voice recognition software and fiber optic internet, despite how much of an advantage that kind if stuff can bring to this game, compared to, say, a budget controller on a potato running over a budget cell phone's hot spot.
Eh.
Given how many people would get caught "multi-boxing" because they play in dorms, homes with their family, at their friend's place, live in apartments, or at an Internet cafe, and how easy it is to work around (virtual networks and IP spoofing, not to mention simply getting a second line, or budget cell phone account), I think this whole "multi-box" crusade would do far more harm than good.
Some people have an overdeveloped sense of competition. That leads to some people willing to pay money for an advantage. Others outright cheat, or act like complete jerks. Some go on moral crusades, ignoring empathy and compassion in the process. Such is life.