I find that most (all) posts that include an enumerated list of sub-questions are bad. Outwardly, this is because they're too broad: a good answer would have to go through too much material. Often, the OP has encountered several manifestations of some underlying lack of knowledge and hasn't taken the time to focus the post down to that underlying issue (in some cases this may be a result of that issue being subtle, but in my opinion it usually is not). In other cases, there is one obvious real question, and then a bunch of related follow-up questions that aren't really related to the important issue.
I find myself often commenting on these posts, asking the OP to either split the post into several smaller, more focused posts, or to just focus on the thing they actually want to know.
Should we update the help center to specifically remind people that lists of sub-questions are usually not a good idea?