I think there are many sellers of some XenForo-related products on this forum. Recently I encountered illegal product sharing by my customer and then he even requested a refund after I blocked any access to the products he purchased. I want this to anyone who sells his own products, so I'll share some info about this pirate.
His username is Sabotage. (Name: Kellie Olson - probably fake, also may use nickname 'opaapoopa')
e-mails: Kmo483@comcast.net, firstname.lastname@example.org, email@example.com (fake email)
If you already have this user on your forum I suggest you to ban any ability for him to purchase.
Also you may share some info about pirates who stole something from you.