Why does social media move so slowly? Twitter installs abuse button, finally.

Just now, Twitter has decided to add a Report Abuse button to its site.
This was in response to Caroline Criado-Perez, a feminist who in pointing out it would be nice to keep a woman on the £10 note, received heaps of abuse, for her campaign.
What is disturbing about this isn't that the trolls are out in their full anonymous force, so much as the fact that Twitter only acted after a petition on change.org got enough attention.

Otherwise they were content to let it slide:

Twitter says "We have found the reported account is currently not in violation of the Twitter Rules at this time" pic.twitter.com/HnJ6gueb3u

— Feminist Frequency (@femfreq) July 28, 2013

My favorite is the last in the series:

So in conclusion, we should do something about online abuse. Just not any of the things that have been suggested, because I know much more about the internet than you and they aren’t even worth discussing to see if there’s a kernel of usefulness in there.