Do you have tips on how to approach coworkers about "odd" topics via private messages? The "hallway" principle as I understand it is that it is low-key, low-risk, you can immediately read the others' reactions, and you (usually) won't be blamed for odd thoughts, nor does the other side need to feel pressured to handle your question well.

Good question, I completely overlooked that aspect of online interaction.

I guess more real-time digital communication such as video or call (video taking priority given that it contains additional sensory information) could come close, but none of these are 'memory-less' as physical interaction.

I wonder if I myself have blown through professional relationships in this way...I like to think that the cultures I'm in aren't so risk averse towards the first impressions they make.