Safeguarding myself against a lunatic neighbor?

[Sean H.]

One of the lots i'm developing is adjacent to a rented house that has a carport encroaching on my property. I finally got in touch with the owner and he was on board for having it taken down. Unfortunately he has the property managed by a slumlord property company, and wants to leave them in charge of taking down the carport. This has been going on for about a month now. Unfortunately in that time the tenant has got involved, and has to tried to make the problem her this business. She has tried calling the water management company saying my trees were causing her toliets to overflow, then tried calling the inspections department trying fabricate i was doing unpermitted work, and today she approached me saying she was filing a police report for harassment if i continued to try to communicate with the owner and property manager about taking the carport down (ironic, i know). Thus far, she has made up numerous lies to the neighbors, to try to get them rooted against me (developers are usually not a well liked bunch as it is anyway). So i wouldn't doubt that she would lie to get something filled with more unlawfulness with the police force. 

My question, is there anything i can do to safeguard myself from any future legal disputes with this crazy tenant?