The hard part in coming up with lists like this is that any idea someone puts forth has only a percentage of the tables out there for whom it is considered "bad". There will always be a few tables for whom the social contract of that table allows for that thing and doesn't think of it as "bad" on its face. Now more often than not, most tables
would say "X makes for a bad DM" or "Y makes for a bad player"... but none of us have any real idea just how many exceptions exist out there that prove the rule.
So a lot of these suggestions are good baseline rules for a large swathe of the playerbase... but none of us should take them 100% to heart and believe there's Only One Way on this. There will always be times when an exception can be found and it's good to remind ourselves of that from time to time. If for no other reason than to maintain a sense of cordiality when we run into that table and can politely agree to disagree with them and then walk away. We may think the way the way their table runs is complete and utter bullcrap, but that's no reason to be a dick about it.