Twitter has quietly changed the way blocking works in a move that means once-blocked trolls can once again interact with their old targets — but all of their interactions will remain hidden from their targets. Under a new policy thats already gone live, users will still be able to follow, and see new updates from public account holders, even if the followers been blocked. In effect, Twitters blocking tool is now more of a mute button, as Forbes notes — which means blocked users cant really tell theyve been blocked. The changes have garnered some protest from users who previously blocked others to protect their public accounts, and who didnt want to lock everything down using Twitters private account feature.