Sorry, but the sheer ignorance of people, internet wide, regarding high energy physics is really starting to piss me off.
MACHINES LIKE THIS EXIST ALL OVER THE WORLD ALREADY!!!
THOUSANDS OF THESE EXPERIMENTS HAVE BEEN CONDUCTED SINCE THE 80S!!!
The only difference is that the LHC is bigger than previous ones, and cost a hell of a lot more because it had to be built below ground.
Re: Black holes - Earth won't be sucked into a singularity because they won't be able to generate something sizeable enough before it sucks itself up. Yes, they can do that, it's actually been observed according to telescope data.
Re: Strange matter - It's only a theory at this point in time to make the maths work out in M-theory. Strange matter's existence is sort of disproven by the very fact that the universe hasn't been gobbled up into strangelettes yet.
Re: what's the point? - Oh, gee, I don't know... What was the point of testing out working nuclear fission or scraping mouldy bread for penicillin? The reason is that maybe we'll be able to fogure out how to get things like hot-fusion working, and how to harness gravitons and tachyons, if they actually exist like the maths seem to imply they do.