When the houseguests are on lockdown, they lose access to the yard and are sometimes separated so they aren’t able to effectively discuss the event or what happened.
Houseguests are discouraged from discussing the events but often sneak in talks occasionally, before CBS cuts the feeds.
Big Brother All-Stars live feed viewers are aware of at least two confirmed instances where wall yellers have gotten messages to guests, but it seems like there may have been more.
There have been rumors of another wall yeller who didn’t seem to be heard by the house, a banner that was flown over the house, and apparently a drone scare that sent the house into another lockdown.