Crazy Mary has pushed my boss over the edge.  Her continual rantings and trespassing has led to the addition of gate locks on company property and the posting of this sign (click to read the fine print):

My company isn't messing around anymore. I love how the sign blatantly blames Crazy Mary for the closure of the alley to the public.

(For those of you unfamiliar with Crazy Mary, read here or here.)