Didn't all of this start with Barruga taking exception to an unnamed instructor (which we all presume was Petty) that was advising cops to seek cover behind the pillars?
Presumably, but it was because Barruga was taking statements out of context. He essentially turned a "when you have no other option, use what you got" statement into a "stacking pillars will protect you from the apocalypse" statement. It's all about Context.
Do you have to be a cop to have an opinion on how to use cover? Nope, so how is that shit posting as you so elegantly call it?
I don't think it relates to people saying you have to be a cop to know how to use cover. You do, however, need to be a cop to know how cops operate and function in and around their squad cars. Departments have policies and procedures for operation and service, and officers have individual habits based on unique and exclusive training and experience. There is a requirement to delineate between general advise and tactics, and TTPs that are task-specific to LE. For that task-specific teaching or instruction, there must be a proper frame of reference and background.
The issue I have with Barruga (which may or may not be somewhat inline with what a lot of people feel) is that he markets himself on his videos and in person (according to accounts here and elsewhere in AARs) as being the one guy that teaches people the "no fluff" REAL way to do things, and that everyoyne else is teaching all sorts of mall ninja tacticool stuff that involves a lot of BS. Oddly enough, every video I've seen of Barruga involves him doing the EXACT SAME SHIT as many other instructors. I'm not being taught useless bullshit by Pat Rogers (RIP), Steve Fisher, Dave Spaulding, and other high level instructors. From how Barruga appears to describe his methodology, he gives the distinct impression that he's the only one out on Fantasy Island doing the right thing. When you market yourself that way, I think that could count as shit posting. He then makes comments about how people are ripping on him for being different and trashing their unrealistic or poorly constructed training programs. What he fails to realize is that there is controversy because people are just getting annoyed with him running his mouth/keyboard. When he's shit talking/shit posting, all he's doing is making enemies. Nobody gives two shits about what he's teaching, they/we just want him to STFU about it and stop thinking he's a special snowflake.
Whether that's relevant to this discussion, however, is arbitrary. Just my $0.02, which is worth exactly that.