BM&AG and photography

Missed this while I was away but it seems Birmingham Museum and Art Gallery is cracking down on photos of their collection appearing on Flickr and, presumably, other online venues. You can get permission to take photos there if you sign a waiver that says the copyright remains with them. Presumably this policy was put in place before the rise of digital photography and online sharing muddied the issue with people using Flickr, etc in the same way folk used photo albums in the past. So should BM&AG just ban photography completely?