Homebuilt Rov Forum

What can I mount on an ROV that is not lethal, but could deter people and animals? I am going to summer camp and there is a huge lake and a river feeding it that I want to explore, but am worried about stupid teenagers messing with my rov or its tether, and I want it to stay safe. I was thinking some type of electric weapon? Like maybe something that when activated could give a small shock. i want people to get the message to not touch my rov, so what could I use? no spearguns btw Thanx all!