We've been wondering whether the students of Chaim Berlin could see the wig store display from the front of the building. ProfK claimed that she couldn't. Lucky for us someone (scroll to the bottom) decided to post a picture from the point of the Yeshiva closest to the store:
Blow up the picture to full size. I can only barely make out one of the heads and not very clearly. And this is at night, when the pictures have a back-lighting. During the day it is probably more difficult because the traffic is greater and the lighting doesn't have as much an effect.
To see this display, the bochurim have to make an effort. It is not right in front of them all the time. So I fail to see the difference between this store and anything on Ave. M.