And we'll just tx the crap out of people to pay for these dumb idea's, right? Of course, we'll need Al- Gore to make a "documentry" a few years in advance to sell the idea, cause a panic, and get the sheeple to wllingly give you their money.
Actually, the risk in any given year that we get hit is is small. The risk over several thousand years is quite high. The results would be catastrophic.
Being hit by a big asteroid is a lot more of a threat to mankind's survival over the next 100 years than global warming--you might consider that the Gulf of Mexico is an asteroid impact crater.
Any sensible species in our situation would be taking steps to deal with a known threat of these proportions.
It really is only a matter of time. It would really suck if we diddled around for the next fifty years and then found we were in the gunsights of a big one only five years out; but we needed twenty years to get it moved. My boy and my grandkids will still be around. I'd like it to stay that way.