Really? Is this your best example against minion use?
This has nothing to do with minions, this is just a bored player acting OOC and silly to sabotage the mood of the adventure.
If you don't trust your GM why play with him at all? And you said it correctly it's a "cooperatively playing a game" , a player doing silly stuff to break the inmersion is not cooperating with the game. A player acting like the previous example or your 'barbarian pokey stick' example is not only defeating the "intention" of the DM, but defeating the intention of the game.
I refer you to my 'sig'.
Actually, it was in response to someone else's example of how to view the minion rules in game context.
I don't think it has anything to do with bored players. If taken as written, you can attack with anything that can cause damage, and the minion will drop. This doesn't specify that the character needs to use their favored or not so favored weapon. In fact from what I have seen, and what everyone is saying, it doesn't specify whether you have to use a weapon at all. It is up to the DM, as you make it sound, on whether he wants to use the rules as written, but it didn't sound as if this thread was about what DMs should do, but whether the minion rules were good or not.
Which leads to a different discussion. Whether the DM has the authority to make changes to the minion rules or not.

-wally