Twitter has a really good tool to combat harassment, and finally it is available for everyone

uplifttogether:“In pretty much every case, Twitter’s quality filter blocked the outrageously obscene and threatening tweets, while still allowing the merely critical and disagreeable in. It blocked, for instance, various one-word expletives, comments on my appearance, all tweets (offensive and not) from my obvious troll accounts, spammy messages from some guy who tweets me the same thing all the time, and my co-worker’s promise to “kill you” (me). It did not, however, block more benign criticisms of my work, or the words “rape” or “kill” used in a news setting.