It is wrong to smoke at a kids party.
Tony is at his nephew's 5th birthday party.
Tony wants to smoke a cigarette.
Tony excuses himself to the backyard where there are no children and has a cigarette there.
Tony lights up a cigarette while sitting around the table and eating cake.
No one gets upset with Tony and the kids are not exposed to secondhand smoke.
The other adults tell Tony off and the kids breathe in some secondhand smoke.