This is a very early beta! Use at your own risk.
Shields Up aims to mitigate the flood of tweets that can inundate a user when a single account publicly mentions their twitter handle. Instead of using a follower list as a source for accounts to block, we build our list based off of interactions such as retweets of the offending user.
After logging into twitter, you will be asked to enter a username that is the source of unwanted attention toward you. Shields Up will gather a list of accounts that may be likely to follow a dogpile request, based on followers, retweets, and/or replies. You will then be prompted to download a list of user ids that can be imported via Twitter's new block import, available from your Twitter Settings page. Note that the rollout is expected to take several weeks; you may not have this option available yet.
Shields Up is an Open Source project by OAPI. The backend is Ruby and the frontend is PHP. Feel free to review/contribute at https://github.com/oapi/shieldsup.
If you are certain you want to try Shields Up in its BETA state, proceed on.