If the bans were according to bans in the past - as in ... the violations similar, equal or worse than from any other member resulting in the same penalty - they are just.
If however these members were held to a higher standard - resulting in harsher penalties for violations other common members had not been punished equal or as harsh - they are unjust.
Just as easy as that. I am sure no one is calling for double standards - one way or another.......