Twitter today acknowledged that it’s begun testing a new setting that let users limit who can reply to tweets. From a report:
The setting was first noted earlier this year. Similar to Facebook’s post view settings, the current implementation features a small glove icon in the corner. Tapping on it brings up a “Who Can Reply?” window. From there, users can pick from one of three options: Everyone, People You Follow and Only People You Mention. If you opt for either of the latter, the reply function will greyed out for all who don’t fit the description. They can view, like and retweet the thing, but they won’t be able to reply directly to the sender. The thread itself will also acknowledge that replies are limited.