Block Together - A useful tool which helps you block trolls on Twitter.
ePHOTOzine - Photography website with camera, lens and smartphone news, reviews, photography techniques, plus a photography gallery and forums, with photo competitions, blogs and buyers guides.
Moderate - Identify, mute, and block trolls in your Twitter feed
CameraDecision - CameraDecision helps users to find a camera based on pros and cons, comparisons, and descriptions.
Boyfairy - Your opportunity to educate right before you block someone.
DPRevived - The community-run digital photography resource.