There is (and has been for some years it would seem) a 'Breastfeeding Welcome' sticker on a TOILET door, in the antenatal department of King's College Hospital, in London. My friend tried to get the sticker removed a few years ago but it's still there. KCH is accredited stage 1 under UNICEF Baby Friendly Initiative - this sticker is not baby friendly. The message is totally subversive.
If you tweet and feel inclined, their twitter account is @KingsCollegeNHS