pretty much this
Organizing pubs to any degree is a difficult task.
And often i've seen people i've never heard of trying to organize a mostly clanless team.
They struggle to do so to say the least.
Alot of times pubs will only listen to either spammed commands from well known/ players who top the charts.
looks something like
LEFT
LEFT
LEFT
LEFT
LFTE
LEFT
L
FETL
FLET
we've all seen it
Sometimes it works sometimes it doesn't.
More of a crapshoot than anything
It'd actually be pretty easy to organize a pub if a game (a 2nd generation game at that) included in game voice comm on release. 2009 or 2010 when Warband came out and what? Like 2007 for M&B? I can maybe, kind of, sort of see a rationale behind the original not coming with a voice comm, but the 2nd game has no excuse for it.
Make a simple gui that allows you to mute annoying people and now there's literally no reason not to include it. I've pubbed so many different FPS games from small servers (under 20) to large ones of 100+ that had voice comm and pubbers were relatively organized when they could talk on the fly to their teammates.
BTW, I agree with the points the OP was making. And the word to describe the mindlessness is called "mob mentality". And for the most part you are stupid if you don't follow the mob even if it means walking into a certain death. If there is one team that has 30 people in a mob roaming around, and you don't have anywhere near that number, generally speaking you don't stand a chance (obviously terrain and the units you have with you matter, just as a general rule though you should stick w/ the mob if you're infantry).
CSB: I love when your team is losing every round in a pub and they still decide to march across open ground to the meat grinder doing the exact same thing they've done the past 3 or 4 rounds. As cavalry it's much harder to pick people off if they are grouped up in a crowd (even if they are all non-polearms the chances of me or my horse taking damage or dying are pretty high). I, and I believe most other smart cav, go after the lone footmen who can't defend themselves. I try to avoid other cav unless it's to protect my infantry. It's like a lion or a shark, you're going to go after the easy target before you take on an elephant. So many times in a round I see what the OP is talking about where 1/4 or so of the team is too slow to keep up with the mob and they are easy pickings for cavalry.