What to do with HIGHLY persistant and annoying preachy christian co-worker?

Ok, you guys here know me to be an atheist. I've worked at my current job for nearly 6 years now (college shrink) and there's this group of christian people who all know each other and hang with each other and exchange stuff and whatever, I don't mind them. But there's this ONE lady who always smiles at me (creepy, moth-ball smelling granny grin) and tells me Jesus is waiting and Jesus this and Jesus that. Day in and day out, I come to my office / consultory and on my desk or on my laptop there's ALWAYS a post it note with some bible passage or some prayer quote or some crap like that. I've told her nicely and not so nicely and she always replies with the same creepy little smile with something like: "I won't stop because Jesus has told me to lend you a hand, because one day you WILL come to him... and he never lies, so I know one day you will listen and pay attention and bla bla bla!!"

I've tried nicely, I've tried reporting her to the dean (supposed to be a secular institution, but he only shugs and laughs and says 'ignore her'), I've tried yelling, I've tried it all... I still find an annoying post it on my desk every fugging morning!!

What to do?? How to make her stop?