Drastic times call for drastic measures... or something like that.
After much internal debate and several drafts (unfortunately not of beer), I finally wrote and mailed my Cease and Desist letter, otherwise known as a C&D. I had spoken with the local police; they suggested I take this step before filing a restraining order. The theory was that a letter would be less likely to incite a negative response than legal action. I'm not sure they would've said that had they read my letter, but believe me, what I finally sent was toned down considerably.
