Predator Alert Tool for Twitter is now available as a WordPress plugin:

Predator Alert Tool for Twitter empowers you to document harassment on Twitter and alert others about predatory users. What constitutes “predatory” is entirely up to you; the software makes no claim as to what behavior hurts you. Predator Alert Tool for Twitter can be used to, for example, flag trolls, warn your followers about rapists, or to expose cops and snitches who use social media. Moreover, what you share can not be censored or removed by Twitter itself because Twitter is never informed of your report.