Stickers, I say me and you are pretty surely not to blame for any carp infestation.

The only reason I know I've never used them in the lake is because I only catch bait at the spillway when I'm going to one of the rivers, and I never use live bait for that. All those shad go into ziplock bags and sit on ice until they are either used or thrown in the river at the end of the day...not the bags. Those are washed and put in the truck for reuse.