I'm not going to worry about it too much. When I first got into this hobby only 8 short months ago, I was spending pretty much every free minute and all my folding money on collecting and sorting through halves. Now I go when it's convenient and I occasionally keep folding money in my wallet - sometimes for days at a time

!
I'm fairly sure that while there may be a short term increase in roll hunters, there will be some that try it once, get skunked, then quit; some that try it for a while and then have difficulty getting rid of the coins they don't keep and quit; some that give their returns to coinstar and get tired of losing the 10% fee and quit; and then a relative few that keep at it.
If the price of silver drops dramatically, I'm confident a lot of 40%'s will find their way right back into bank vaults, probably rolled together and waiting for one of us to find them. Of course, if silver rises dramatically, there will almost certainly be a news story (or series of stories) about this hobby and we'll all be competing for whatever's left. But that will make for exciting stories amongst those of us in the forum - when we find that little backwoods bank that gives us loads of silver.
At the very worst, I think it will be a temporary craze and then things will get back to the way they are now. Remember how many flags you saw in the months just after 9-11? Pretty much every car and house proudly flew 'Old Glory'. Now how many do you see?
Of course................. I could be wrong, but at least I HOPE that's all that happens.