You can buy a whole lot of paintball rounds for the cost of an electric fence...
Keep records of your incidents, Felix. I'm sure they'll be interesting reading... only don't leave 'em where they can be used as evidence
BTW,
this link shows the velocity of a Tippman 98 as being approximately 285 FPS. The second round of testing had a velocity of 295 FPS, attributed to the CO2 tank heating up.
They also say that an experienced player can achieve around 7 shots per second, although the official specs are just 5.
Hmmm... The Spyder E-99 has a ROF of 13 per second... but needs an agitated hopper. And the Impulse can hit up to 20 per second... still needing an agitated hopper.
Can you set up video to catch the little buggers squealing in pain?