In the photos I’m seeing of the sit in, the Bernie-ites have either a black kerchief tied around their mouths or tape over their mouths which reads “silenced”.
No estimate of how many walked out and are in the media tents. At least 50 at last count but some convention photos are showing huge swaths of empty seats (but it could be a break when those photos were taken).
Police have been sicced on the Berniebots and that has to be even more humiliating.