From previous posts of mine:
i lived in a shitty trailer park for over a year. when we moved in, there were junkies, homeless, vagrants who lived in efficiecies by the week, sex offenders, and of course, illegals.
I didn't get on message boards and vent. I sat down with the decent old folks in the park and we determined who the problems were. We applied pressure on mgmt not to renew their leases. When there were suspicious cars, 6 or 8 of us would come out of our trailers at the same time and stand around 5 feet from their car (visibly armed) write down their info, give them shitty looks, etc. If they were up to no good, they left. When bums would walk thru at night, we'd approach them as miilitantly as possible and ask them if they needed directions. The look on our faces and the shotgun rack they heard but never saw meant they didn't come back.
I guess I just don't understand the mindset of being pissed about illegals and not doing anything about it. Scumbags (legal or otherwise) weren't welcome in our trailer park. We made them uncomfortable, scared, whatever, and they took their fun elsewhere.
I'm not saying be violent or break the law. I'm saying you bench in your screen room, you check your mail with your glock clearly visible, you approach strangers and ask them what their business is in this location. They give you guff, you call 911 and report public nuisance, pot smell, suspicious vehicle, whatever. You chase them out.
Seriously, yall call me a lib pussy, but when I see a car on my street I don't know, I strap up, photograph their plate, and I knock on their window and ask them if they need a little help. If I saw scumbags on my street today, I immediately engage them. The law is on my side. They pull a weapon, I center punch both bastards and call 911. They don't leave, I call 911 and report something juicy. The presence of police means they'll take the drama elsewhere.
I don't know how much of this will help you. Start a community intimidation/defense group and disguise it as "neighborhood watch". You have a lot more rights than someone who doesn't belong, and if you are the one who lives there and is calling the police, nobody is going to believe a half-drunk beaten vagrant anyway

If he doesn't live there, he is bringing down your property value - he is actually stealing from you. So let you feel no guilt!