Dumbest thing every main character did in the show

Walt

Drinks too much wine and declares to Hank that his Heisenberg is most likely still out there.

Skyler

Confronts one of Walts ex associates after he retires from the meth business.

Jesse

After Walt decides to bring him into the fold at the lab he determines making 1.5 mil isnt enough. Starts stealing extra meth to sell to .... people in rehab.

Walter Jr

Hes a good kid but did try to get an adult to buy him some beer. Got nothing

Marie

Clepto much

Hank.

Goes to a shady bar, starts a fight but decides first to leave his gun under the seat of his car.

Gus

Continues to go to the nursing home to torment Hector Salamanca and also decides to bring Jesse.

Mike

Using Daniel Waxberg as a lawyer and putting 2 mil in his grand daughters account even if he meant well.

Saul

Great idea to just give your associates wife his money so she can pay the guy she was sleeping with and cooking the books without telling him.