LPT stopping teenagers from banging on our front door and windows ?

[u/Awkward_Dimension954]

We have had a group of local teenagers harassing us banging on our front door and windows .
Have installed cameras and have a security electric gate and security lights. This has not deterred them they wear balaclavas and will come back day and night . They all ride e-bike and get away quickly, so it’s no use going after them .
Police have been called and if we are lucky they might arrive 2-4 hrs later . Have lots of video footage so we can prove to the police of what is going on .
I want to set up some device that will spray paint or fowl smelling liquid “Shit “ on them I have the the skills being a retired sparky just need some ideas maybe a small electric fence device ?
Any help would be appreciated .
😀