I have learned being the neighborhood asshole goes a long way. My immediate neighbors and I get along but the rest of the people around I could really give 2 shits if they like me. In fact we have become known for don’t go on that farm they are nuts….. perfect by me. I have my ol man from about 25yrs ago to thank for that
However it does still happen from time to time. 2 years ago we caught a guy sliding in on us from the neighbors. Hung cameras on several spots where we thought he was crossing. Bam 8-10 times on cam over a 4 week period. Everything went to the local CO and he was issued some pretty good fines for criminal trespass since we had it posted well!
I also hung the pictures of him trespassing in every business in town that would let me, with his name and a warning that he was a trespasser and poacher - caused him to lose a lease about a mile up the road from us - really tore me up
Word gets around fast when you are an asshole and that is fine by me.
I Help my Neighbors whenever I can and we take care of each other, post the farm as much as possible, run cams, talk to the CO regularly during deer season- I actually send our new one text messages pretty often just to see how things are going and now we have them have sit on our farm/road and run night patrol.
I haven’t found a dead buck in many many years. I am sure it still happens but much less than before
I'll second that it takes "a neighborhood" and being an unhinged jerk can go a long way. I caught a trespasser decades ago. I took a Wednesday off work and guess he thought no one would be out hunting. I "rattled" him in. He walked under the tree I was in, and I jumped out from about 6 feet up to land next to him, element of surprise which set the tone.

I rode him like a rented mule all the way back to his vehicle because he claimed he didn't have his ID/license with him. He led me on a convoluted march back to his vehicle that crossed onto another neighbor's property, which added to the spicey "conversation" I was having with him. I pointed out that he just crossed onto another piece of private he didn't have permission to be on. The guy was from out of town and used a neighbor he knew as a jumping off point. Word traveled around the area that I was an asshole and rates of trespassing dropped off considerably; that and everyone knowing I run LOTS of trail cams. That property is not good for spotlighting from the road, so that helps.
For the property that has seen some shining, the neighbors are very vigilant which is a huge help. I did catch a couple of guys pheasant hunting on it shortly after purchasing it and prosecuted them for trespassing. Pretty sure they threw a Molotov cocktail into the CRP 3 am one night afterwards but I couldn't prove it. Neighbors were up with a newborn, saw the fire glow and called the local fire department. I slept through it. Again, word travels. Couple of local shining deer poachers have been busted in the area and that has helped too.
Some of the topics of our "conversation":
You are the reason that it's getting harder and harder to gain hunting permission.
I'm paying property taxes, and you aren't, you are a thief.
As a "hunter", it is your responsibility to know where the property boundaries are and be positive you have permission.
The landowner has the legal right to request to see your ID/license and failure to produce it adds another charge on top of trespassing.