Neighbors killing young bucks is always going to be a problem until you solve it. Either go take the lease from them or move and find better neighbors. This has been a problem for trophy management for years.
I imagine its pretty tough to lease up all the backyards in an area......
Maybe a minimum acreage rule should be passed. Less then 40ac and no hunting allowed. That would solve a lot of problems because hunters will be hunters.
It's hard to kiss the lips at night that chews your a$$ all day long.