Found this, ironically, from a comment on Twitter itself:

Twitter refuses to uphold Terms of Service

As I found out last month, the reality of Twitter is that they refuse to warn and/or ban people who use their service to “abuse, harass, threaten, impersonate or intimidate other Twitter users” (to quote their forth line item on their TOS page). What does this mean? In short, anyone can use Twitter to consistently harass you and ruin search results for your identity and Twitter won’t execute any means of community management.

Ariel Waldman’s been experiencing persistent abuse from the same internet fucktard for at least a year, but Twitter is too scared of lawsuits to ban said fucktard.

I love Twitter but this ain’t right, guys. To put it mildy.