Posted: 14/10/2014 at 13:26
You can buy special sticky paint that makes a mess of anyone climbing over walls and fences that have it painted on. You can also attach spiky strips to tops of walls and fences - seen both done on daytime TV programme on burglary prevention whilst suffering from bronchitis recently.
You can also buy a decent and not too expensive CC TV camera and place it high up on your house to film any intruders.
Up to you whether you then put up warning signs about the nasty paint and spiky bits.............
Consult the local police station's crime prevention officer tfor advice oo. Once these kids get away with doing your garden they may be tempted to be more bold as they get bigger and that would be even worse.