Relatedly, I particularly “enjoy” when this happens:
A poster makes a post in a lengthy thread (particularly in Cafe Society) in which the OP asks for examples of something, with “I can’t believe no one has mentioned (x)” – when (x) has, in fact, been mentioned at least once earlier in the thread.
I see what you mean, but the other possibility is #43 didn’t read it in the first place. No way to know which it is. I suppose #43 could write something like “as has been pointed out, …” or “as post 26 mentioned…”
I guess that might be a bit much to expect (not being sarcastic).
In particular when it’s so easy to search a thread.
Surprisingly often, in the OP.
Actually, I think this was mentioned in post #2:
This bothers me too and I try to always read to the end before I reply, but I know I screwed up recently. I felt really stupid and I just know you all noticed my faux pas.
I don’t mind it so much. We are human. To err is Human.
More to the point “shit happens”.
I for one did not notice. Can you provide a link so I can rejoice in not being the only one to which this happens?
Not being serious! 
Fix that spelling. You have time. (Just trying to be nit-picky in the Dope tradition😉)
Your wish is my command. Should link to the thread about words that are spelled wrong by everybody else but too lazy to search for it.
Yay!!
Oh, I spell everything wrong.
And I’m a good speller IRL.
But, as said “shit happens”
In your case of course you don’t need to read the thread OP or any other reply, because staying on topic is impossible for you.
Entirely untrue.
Just cause you don’t understand my meaning is a you problem.
Always, always
Getting real old. Think I’ll nap too.
Haven’t read the thread, but couldn’t wait to say that I strongly agree with the OP’s first two sentences!
[golf clap]
Haven’t read the thread, but I really hate when people don’t read the thread before posting in it.
ETA:
Ninja-ed. D’oh.
2 golf claps!
Hard agree w OP.
Generally I’m a total believer in reading 100% of the thread before saying anything. Which assumes that you’re here all day every day keeping up. Not realistic for most of us, and unhealthy for those of us who often do. Oops.
If the way you find threads is by looking at the latest or the forum pages, that sets you up to first notice threads that are already 550 posts long. If you find threads from New, and are here often, you’ll be catching them near their beginning.
If you can’t read the whole thing, for darn sure read the first few posts after the OP, and the last WAG 2 days or 2 dozen (whichever is fewer) posts at the end. Especially for highly personal threads it’s also worth filtering the thread to just the posts by the OP themselves. That’s how you learn whether somebody recovered or died so you can express the right sentiment for the right reasons.
And even with all that prep, please, please, please open with some disclaimer like “I read the beginning and the end of the thread but skipped the XXX posts in the middle.”