I do not tell everyone here everything that happens because they think I am delusional. But today, I found blue plastic on the lawn buried between the grass that could harm the mower. Two weeks ago, the cut a ribbon that we put on the tree that they slashed 17 times, and made it into a string to get tangled into the blades. Yesterday, my wife told me the dug some pot holes into the lawn and put some type of glue or larva where the dogs goes. She had on dishwashing gloves on, which are pretty strong, and tried to pull out the debris, but it ripped the gloves. Like I said, from petty to deadly is a win for them.