You make a very strong statement regarding a data point of one, that is to say yourself.

Immediately thereafter you list a way you can get flagged through no fault of your own because a friend who was flagged shipped things your your address as a gift.

I don't want to have to establish a strong background of years of membership in order not to get treated like trash. I'm not interviewing for a job or a date I just want to give you my money for goods that aren't counterfeit.

When you have a large minority of fakes and problem shipments you are going to have outliers. People whom you shipped 5 fakes/broken stuff in a row.

Banning these people means that not only can I not trust you to sell me a legit good I can't trust you not to turn your back on me afterwards.