Yes, the cobra effect exists. Should this mean that everyone needs to stop all forms of positive reinforcement? I don't believe so.

I doubt anyone would risk a comfortable job at Twitter against a few bottles of beers. Even if they are really fancy, that's what... $20-50?

If this had been worded as a "Haha, I stole the bad team's beer" I would have laughed.

However, worded as "where is my reward for being smart and stopping the cobra effect?" that's just an humble brag and plain unfunny.