Buy a paintbrush.
Save all your semen for days or weeks. No sex, no masturbation, no anything.
After awhile you will be feeling like a fire hydrant.
http://www.nowthatsfuckedup.com/bbs/ftopic18740.html
Go there and look at the naked pics of Vida Guerra.
Masturbate furiously into a small bowl. Take 20 minute naps in between sessions. I would say have sex, but sometimes masturbation produces more semen than almost all but the best sex.
Dilute the accumulated semen with water and olive oil to increase the amount and slow/stop the drying/evaporation effect.
Mix this new semen solution together. Keep in fridgerator intil ready to use.
Late at night, the night of your collection of sample, walk outside with the bowl and paintbrush.
Generally spread the solution over any and all areas they might come into physical contact with, such as front door handles, car door handles, newspapers, lighters next to the pack of GPC 100s that is inevitably lying on the front porch, etc.
The goal is to get good coverage, so that you know this man and his little filthy family get your homemade irritant all over their grubby little hands.
If this sounds like too much work and effort, try and move to the Bay Area, where instead of white trash you get black, brown, yellow, and white trash, and even the white trash aren't the redneck types, they're usually more "homeboy" type trash.