I really hate it when my kids throw a tantrum in a public place. They're smart and know they got me because it's a public place where other people are around and watching. I'm in their territory. The only thing I hate even more then a child throwing a tantrum is when someone approaches you with advice on how to handle the situation. Like I'm doing something wrong. Like the tantrum is somehow my fault. Yea, it's my fault, I didn't give in and give my child the damn candy bar she wanted because I didn't want her to ruin her appetite for dinner and have her mom mad at me. I'm not ruining my chance at some snookie later over a candy bar.
Next time someone approaches me with parental advice about a screaming kid I think I'm going to say, "Look buddy, I might not be able to smack my kid right now but there's nothing stopping me from smacking you across the head right now. So back off." That would actually feel pretty good.