Either way, being cautious isn't a bad thing. Could you inform security at your job, if you have a security department? Or perhaps a manager, or at the very least a few male friends you trust? At least in that even if he were to show up, you wouldn't have to deal with the situation on the fly, so to speak.

And were I you, document his Facebook posts, such as this one. In a court setting, this could be valuable. His defense would, of course, argue he isn't specifically speaking to you, but looking at it from the perspective of the jury...it could help your prosecution.

Please be safe, and keep us posted.

Hugs,
Harley