Back in early '90's I lived on a 27 acre pond (private) I was the only one that lived on pond, had 14' & 10' aluminum boats in Back yard on waterTM's an batteries on porch. There were 10 permits sold each yr. Same people every yr. I started sinking x-mas trees, cause there was lots of crappie. I would lower buckets with trees with 25 tests fishing line , then cut line with 1 ft. of slack, clip on round cheap plastic bobbers to mark. Because I'd bring friends and kid's fishing, if I wasn't home I'd tell'em cast to floating bobbers. Went on vacation 2 weeks, came home all bobbers were missing , so I go out and find them about 20 spots with 2 trees, set hook in them with new bobbers. That weekend ol-timer bout 75 , that had been fishing that pond before I was born, tells me, hey someone keeps marking my hot spots with bobbers ! Ha Ha Ha