I do resist calls for my own emotional solidarity (hand holding when "trapped" in the mob, etc). It isn't "my problem" tactically right now. But I only have to look back a few decades. Remember the police abuse of gay bars in Dallas in 1980? Look at prosecutorial abuse in Internet cases, as well as 2nd Amendment cases. Still, solidarity can demand personal sacrifice, and sometimes there is no immediate choice.
Update: Dec 14
CNN has a major story about witness credibility with the grand jury in Missouri, here, by Josh Levs and Danny Cevalos.