Gab behaves like a Twitter-Reddit hybrid. It has a limit of 300 characters, and users can upvote or downvote posts. You can make lists of people to follow, or browse posts by topic or trending hashtag. Gab has just a few rules: no child porn, no doxxing, no threats, no promotion of terrorist groups or agendas. It also has one suggestion: "try to be nice and kind to one another." It has no user block feature, only mute. Gab also allows people to mute their feeds by keyword, an anti-harassment feature that, Torba noted, predates Twitter's own rollout of the same idea.