GAW,
I understand that it can be hard for men. However, what was posted on the sign was very similiar (and maybe even more tzanua) than what people on the street are wearing. Are you trying to tell me that a non-scantily clad picture is more alluring than a scantily clad woman walking down the street?
PETA believes this is how to act as well. If someone posted how PETA had vandalized a picture of Chassidim wearing streimels on the street, no one could be ok with it.
When we ask for freedoms we have to grant it to others, or we have no right to ask for it.
For the record, H&M’s marketing department says the following:
creative professionals located in the major fashion hubs of
the world. The advertisements that we produce are largely
identical in all of our markets, but the media strategy is
adapted to local requirements and conditions.
If someone had contacted them to remove the sign, they probably would have done something about it.