Inviting Low Ranks

Can anyone provide a solid argument as to why this isn't classified as farming? Someone with 2000+ points creates a large amount of 1v1 or Polymorphic games and invites anyone from a Cook to Sergeant 1st Class, but it isn't considered farming simply because they have the choice of accepting the invite.
I don't find that argument satisfactory in the slightest. For any decent player it is actually hard to fall down to being a striper, or below. On that basis, one can assume that a decent player would have the knowledge to join a game they have randomly been invited to on a complicated map with complicated settings. If one assumes stripers and below are not decent players, can one not therefore assume they wouldn't have the knowledge to know that they're being farmed and blindly accept?
I don't find that argument satisfactory in the slightest. For any decent player it is actually hard to fall down to being a striper, or below. On that basis, one can assume that a decent player would have the knowledge to join a game they have randomly been invited to on a complicated map with complicated settings. If one assumes stripers and below are not decent players, can one not therefore assume they wouldn't have the knowledge to know that they're being farmed and blindly accept?