The owner of the gift key can easily check who activated it (in the order list).
So, if it turns out that the requested key wasn't activated by the nominated friend of TheDudeLebowski, then, I guess, TheDudeLebowski will be banned in this giveaway.
There isn't a rule against that? Hmm, was sure it was there. Should be. I mean, games should only go to eligible people and they need to be redeemed by the person zeo sends the key to, to ensure that. So it couldn't go to said friend either way, not normally.
Makes sense. Even though it'd be great if I could request a key for said friend, I vote for the rule 'to be unable to request keys for friends' to be instated for the above reason.