FWIW, I'm not a fan of firearms but have multiple 'tools' available at my disposal for running off those kinds of varmints. IR Motion detection water driven sentry turret, IR motion sensor flood lights, motion sensing IR surveillance cameras, a high-power airsoft pistol with fast-biodegrade BBS (waiting on the Tommy Gun to arrive), and a full-on 2 watt laser pistol with frequency specific eye protection.
edit: Disclaimer - handheld laser weapons, even with proper eye protection, are stupid and dangerous not only to yourself but also to others who may not even be looking towards the discharge. The only reason *I* even have one is because there was this spider once, which was as big as my fist - and homey don't put up with that. (note: took 2 weeks to receive and assemble the parts. Spider was long gone, but I felt muuuuch better)