no no no! do NOT disclose. if anyone is insensitive enough to be sending you pamphlets with the intent of providing office gossip, then confirmation of your mental health concerns will only add fuel to the fire.

i think you are doing the best that you can. i agree in not taking it up with lawyers. maybe one thing that can be done is to have a harrassment workshop in your office? something that HR implements, reminding everyone of what is/isn't acceptable behaviour, and that these things have harsh penalties or something.