Firstly, please don't take me too seriously on this
I was recently jovially discussing with some friends how a super-eruption (for example's sake lets say yellowstone) could be stopped. Initial suggestions were of course to plug it with miles of concrete and the like, and it was quickly pointed out that the eruption would likely break through or simply spill around the plug.
One friend suggested drilling to relieve pressure in the magma chamber, but on researching it became apparent that this would in fact increase the likelihood of eruption (I think the evidence for this was an earthquake causing something similar in the mount St Helens eruption).
Quite an interesting idea, all though I haven't had time to look it up yet, was to place geothermal plants around the area as this has already reduced the severity of eruptions in other areas.
Anyway, just for fun: any suggestions, far-fetched and wacky or serious for this sort of thing?