Most common I know of is throwing your old bacon and hamburger grease on a stump. Bears chew the stump all up, just like they were rooting for bugs, and the grease is hard to get off, so they keep coming back. Hard to find unless you know what you're looking for.They eventually nailed an old timer up my way for this back in the 90's. Anyone who bags bears on their own for five consecutive years in PA is gonna attract some attention.