Twitter has filed a lawsuit in federal court in San Francisco against five of its most aggressive spam enablers.

The lawsuit takes aim at the people building spamming tools, such as software that latches on to trending topics and starts injecting irrelevant marketing messages into the mix.

The defendants include JL4 Web Solutions, based in the Philippines and referred to in the suit as “TweetAttacks.” Other defendants include Tennessee-based Skootle Corporation, referred to as “TweetAdder”; “TweetBuddy”; and the individuals James Lucero and Garland Harris.

“With this suit, we’re going straight to the source. By shutting down tool providers, we will prevent other spammers from having these services at their disposal,” Twitter said in a blog post.

Source: CNN Money