Threat from FBI agent who happens to be my neighbor and medical marijuana laws in regard to FBI

i've lived in my place for 4 years recently 2 FBI agents purchased the condo below mine. When they first moved in they made this little threat about the smell of marijuana saying they were law enforcement and cant have it near there place. told me to do it near window. made several small threats since than. fine. problem is medical marijuana becomes legal Jan 1, 2015 and i qualify and have already submitted my application. Now these "agents" are trying to enforce laws that don't exist in my state. I dont care what their "federal" laws says my state allows me to legally sit on my couch and take medicine legally prescribed to me by my doctor. Other than the obvious of moving and getting away from these people what should i do? the threats they've made are as my neighbors not as FBI agents. Should i file a restraining order so she can't come knock on my door? I should have no fear of taking my medicine in my own home.