Swarms of earthquakes happen ever few years in Yellowstone. Its easy to find out the number with usgs.gov
The problem is the swarms are happening in a much greater frequency in Yellowstone. This has been reported in years past about the intensity of earthquake activity.
Haiti is a joke compared to what would happen here if Yellowstone went off, even in a minor way.
This is something to be worried about. Period.
You are correct in the possible devastation it could cause.
But there is absolutely nothing we can do about it.
We, like the rest of life on Earth, are at the mercy of the forces of nature.
If you really want to get worried, read some of the recent threads.
http://www.freerepublic.com/focus/f-news/2408976/posts
It could mean we are all doomed, it could mean nothing. Only time will tell, and all the worry in the world won’t change a thing.