I'm thinking of making everyone at city hall pot brownies which should cheer them up.
Why would you feed people pot brownies without their knowledge?
I want to have a little fun with our local officials.
Adulterating food with cannabis and feeding it to people unwittingly is wrong since they did not give their consent to consuming something that affects their mental state. While it is unlikely that the drug itself will cause harm it still may cause people to injure themselves accidentally since they are not sober. You should not give anyone cannabis and instead redirect your efforts into political change if you disagree with the politics of your local officials.
It's just a harmless prank and it would be kind of fun right?
It's not harmless, it's against the law to drug people against their will. Why not just make them some normal brownies instead?