Earlier quoted context omitted.
I was also intrigued by that sentence. I expect it means (open source) programming that happens outside of of big corps. But I'm unsure.
Yep it's the open source, and in general the "spontaneous" development world, that happens without big money, just for hacking. This "place" once was kinda free and not observed much. Now you can't say anything, if you don't respect a good practice (LOL) people yell at you on Twitter. Even saying that commenting is a good idea is a problem. Not cool.
Dude, the problem is just Twitter. Everybody shouts on Twitter, it's a system that encourages mob reactions. "Back in the day" people had to subscribe to a ML to yell at you, so fewer people did; and we all knew which lists were cesspools of trolls and flamers, making it easier to avoid the bulk of it. Twitter instead gives you the whole firehose, unfiltered and amplified. It's not a problem restricted to opensource or programmers, we see it everywhere at the moment.