Apple tells retailers to stop selling the Galaxy Nexus and Tab 14 years ago
Actions can be mafia even without physical violence.
As everyone can see the notice was sent by Apple itself not by an US institution like a tribunal or a governmental agency.
Even juridical acts can be a form of violence expecially if they came from a big organization against a small retailer. The fact that there is no physical violence put them in another plan but violence and intimidations are always of the same nature and qualifies this act as mafia (in my point of view).