Bloody hell it sounds like Mogadishu. Sounds like you need some guys to calm the locals down, and give them some advice.
I do agree, i have all the usual with a decent ground anchor and chain but i also have extra locks on the outside of my up and over garage door which will cause them issues when trying to pry it from the two sides, not obvious and from the footpath not noticable (unlike those garage defenders), i also have my garage (not attached) alarmed, but the alarm is a part of my house alarm not one of those crappy battery things, so when i activate the house alarm at night and when out, my garage is fully alarmed, if anybody try's to get in then my house alarm goes off.
Looking for a 19mm chain as the Thatcham approved ones can be cut with bolt cutters in under 30secs Any idea on best supplier for a 19mm chain? Thanks