Just had my Flickr account which had been set to safe by them when the pro account business came in altered. Originally this meant as I didn't have pro account then I could not post adult content. I was ok with that as Flickr wanted original images not internet stuff. I could still view everyone elses pro account just not post.
Now due to changes in Britain, my Flickr account of safe has been again changed to safe but unable to view adult images unless I buy a pro account. Most other sites just have you provide age verification. Seems a sneaky way to get you to buy a pro account as no age verification system in place. So after 8 years on the site following 371 members I will no longer be able to see posts from our Rubbergears from here and the many FF and biker people I follow.