Instagram rolls out comment-control, puts onus on user to filter trolls

"Danielle Citron, a cyber-harassment expert and law professor at the University of Maryland, said the comment-control tool is similar to those used by some blogging platforms, where people can delete or block individuals who are abusive or off-topic.

If privacy and safety folks collaborate with engineers when building a product from the ground up, features like this might be available from the get-go "rather than trying to tack on privacy and security later," Citron said."