What is the worst thing that someone can do on a first date?

I don't know if I can top these other answers but I'm pretty sure farting and chewing tobacco will blow it

Lying too much and giving a false perception of who you are really because a first date may be followed by a second one , a third one etc and your real personality after sometimes will come out deceiving the girl or guy you wanted to be closed too. Lying yes too much not.

Be completely silent; never say a word. It will cause both of you to be uncomfortable and want to get away as soon as possible, and if you're lucky, make you run in the other direction if you ever see each other again.

Basically, not being honest. Being pushy or overbearing. Trying Too hard is a turn off. Just relax, have fun and enjoy yourself. But, respect yourself too. Make the other person take no for an answer. In other words don't cater to All their wants & desires.

THE WORST??!! Act like a couple and get jealous. Be overbearing and asking for too much too soon. Ask stuff like "Where do you see this going?". Just chill and let it flow

Have their dog pick fights with mine.

Lock their keys and purse in their car.

Call a locksmith and have me to pay them to open her car.

They open it, and she has no money and still can't find the keys.

We find the keys in the grass where she put her dogs leash on.

if the guy decide to go dutch in paying.

if the girl eat to much.

drink too much. hate on ??? obsessiveness