Ok, if you could have one idea adopted by the world, what would it be? "Bottomless Fridays" everyone is unable to wear anything on their lower half on fridays? "Break wind freely thursdays" everyone must break wind whenever they feel it coming, no holding back, or disguising, women included.

You get the idea I hope and I'll kick it off.

Once a year, a world lottery is held, every country, will choose x people to form an armed commitee, who's job it will be discuss a list of 50 people throughout the world to be taken out of the genepool by force and then carry out the much needed idiot culling.

EDIT: So people get the idea better, this is not meant to be all serious, this is a situation that isn't going to happen, this is meant to be fun, enjoy it, if you can't grasp this simple concept or don't like it, there are other topics to talk upon. I'm merely doing my part to have a little fun and keep the community going, so sue me.

Highways with built in heat generators powered by solar panels. This way, they'll always be clear when it snows or ices.

I have this great idea - I call it "having a little fun and not being serious". Do you think the world will like it?

Alright, here's mine. Every January 1st, everyone lives as though their idea of a utopia has been realized, and acts according to its social constructs. Hopefully it wouldn't kill too many people each year.

Think every city should have a gladiator style pit people can go to solve their issues with one another pending a contract signing between both parties, Will give the gangs/chavs a legal way to beat the crap out of eachother and would probably slash domestic crime as people just exchange in fisticuffs instead of with guns/knives etc, Also will be sure to attract desperate d-grade celebs in a futile bid to get some more tv time.

Add a few basic rules and have a ref to keep the death toll to none/minimum and could be something to bet on like the old days.

I'm glad to see some people are in the spirit of things and understand being jovial. :)

How about "sit on your ass" day. It would be easy for me because I already do it a lot.

In addition to the water taps that most people have in their homes, all citizens of the world will have free access to Chocolate Milk faucets. Lactose intolerant individuals will get Chocolate Soy product. Those allergic or opposed to chocolate will receive pity.

That last line truly makes that one a gem.xD

"National Hire a hooker day"

Lets face it everyones tightening thier belts its helping the economy.

umm, well, peace? is that too obvious? I'd quite like people to stop horrificly butchering each other, and the general oppression of others.

If that's not an option, then I'm going for the resurrection of the Fine Young Cannibals music.

EDIT: Just read the OP edit. so I'll also chuck in the resurrection of eighties style haircuts. They really knew how to style some hair!

What about baldness (at least mine is temporary)

I would go for a Politician's war day.

Basically - once a year, whatever country is at war with each other MUST get all the people responsible for the war and throw them in a ring and watch them beat each other to death. There must be one person left at the end, no other rules apply.

Then the winner gets a wooden spoon and a free flight home.

I rather like this idea. Oh, and the soldiers of each side must be paid on that day as well as given free live TV viewing of the battle and the proceeds of the gambling that happens goes directly to research for AIDS / Cancer / growing new limbs on rodents.

7 days of hellfire, burning evil humans 7 days of acid rain, melting idiots, 7 days of normal rain, flushing the remains, 7 days of healing sun, healing incurable diseases. And every 10 years, such a month would come.

Or, every men gets a durable sheep and a llama. B'aa!

Wouldn't that require the opposite? >_> Like removing of belts :P