Someone is going to make money off merchandise with that pose on it. Why shouldn't it be him? I think he can afford 3 seconds to answer his agent with "okay" when asked if he should get it trademarked.
Think of the wildest, most irresponsible adult you know. Now think of them hammered in a bar. Now picture them hammered in a bar openly carrying a loaded gun among a bunch of other drunk people with loaded guns. If this sounds like a good idea to you, you could be governor of Georgia or South Carolina.