I have a thread in aibu, its not got a million posts, but the posts that are there are pretty much unanimous.
I know quite a few people hide aibu, so thought I'd stick a quick link here :)
www.mumsnet.com/Talk/am_i_being_unreasonable/a2057029-To-suggest-the-next-mn-campaign-targets-views-on-invisible-disabilities?msgid=46538395#46538395