I disagree.
The primary value of this site is the exploration and vetting of theories and ideas around crimes. Even though this process will produce a lot of noise, the best ideas will be shared, vetted, and passed on to become starting points, not conclusions for law enforcement. We just don't know when something uncovered here will connect the right dots and become meaningful, so we should keep trying. It's the best way we can contribute.
Like it or not, these photos were taken in public at the scene of a major crime and the people shown do not have any expectation of privacy. Even if discussion of the circumstances in photos were to lead to someone being "wrongfully" questioned about the case.. tough beans. This case won't be solved by being timid with potential witnesses or perps.
Obscuring the faces materially restricts the value of the discussion and ability for people to add to the sum of observations. Take away the meat of the investigative material, and we're just a bunch of people squaking to each other about groping in the dark.
I've not seen anyone make too much out of these conjectures or present them as anything but theories, so I think the use of them has been responsible and maybe even helpful.
The FBI called for all leads, photos, video, "no detail too small". They didn't call for us to be cautious and reserved.
A better improvement for this forum would be to encourage us to stay current with the thread before posting so we're not rehashing things that have been brought up 10 times already.