Why would you pull them out? Leave them for the bugs and critters that can use them for food.
Because it's what I do. Tough little buggers too. Did not want to let go. Same reason I trap squirrels (though I haven't gotten 'round to baptizing them like by BIL does...figures he'll send them to a better place, I just drive a few miles out of town and drop 'em off where there's more trees and acorns - kinda like
Regina/Saskatoon RCMP with natives but mine will survive in the cold) - because I can.
In the end, it's OK though, I threw them in the compost pile with all the dog-doo so any bugs and critters that want them can still have them.