LHC Risks

Is the potential downside worth the risk with the LHC?
Should scientists contniue with turning it on?

I honestly wonder who gave these people the right to do this.
How fair is it for any country, including the Swiss and French, to risk
being sucked into a black hole and all life as we know it to end?
Although i think the adavancement of science is vital to our existence on earth,
shouldn't these scientists be looking at the big picture with the risks they're taking?
So we find out about anti-matter, so what? As much as there may be a very small chance
of anything happening, there still is a CHANCE and i dont think that we should be taking risks like that. I dont believe scientists should be continuing.
Because by experimenting you are learning new information, which means
you aren't prepared for any of the consequences of your actions.
This experiment isn't like anything we've ever done before,
so how do we know the chances and percentages?
How do we know everything and everyone will be safe?
It makes me very angry that everyone is just "okay" with us being in danger like this.
I guess that there are risks in everything, for god's sake they say you can get Cancer by eating pretty much anything. But the only person you're risking is yourself when you do things like that.
You're not endangering other countries and even the entire world.
All i can say is that i enjoy my existence on earth, and i dont feel that it is the right of ANYONE to have a say in whether or not i get to live to be 40.
Something about this reminds me of the teenagers that have gotten in car accidents in our area.
Although sad, it is true that they had no idea their lives would end. Part of that is because most
people have no real idea of mortality. No one seems to realize that yes, we can die at any moment. Any given second there could be something that could kill us, and that doesn't register until we're faced with it. My dad told me the first day i started driving that i was driving a loaded weapon, and he's 100% right.

So what in the world were they thinking when they built this?