A new user asked a question, found out the answer, and took the time and effort to inform us about that and even make his solution clear with a diagram: Arduino IR Receiver (Answer).
Now, he used Fritzing, which is clearly just not good enough for some people - sigh -:
Enough with those stupid wiring diagrams already! We do electronics here, which means we communicate circuits with schematics. – Olin Lathrop 8 hours ago
I flagged this comment as rude or offensive. This comment violates all three points in the Be Nice policy. My flag was declined.
Whether you agree with the comment or not, this is not a way to treat other human beings. This comment clearly violates many policies, written and unwritten rules that are on the very base of the StackExchange network. Clearly there are some disagreements about the treatment of new users and other things. But has this lead to the point we can't trust the flagging system anymore?
I've done a small test, and flagged some other comments:
A comment on Understanding to isolating sensor input capacitance which was removed (thanks for that).
What a mess! What MOSFET? What switch? Which capacitor do you think is the "filter" capacitor? Do you realize that D1 will always be reverse biased and therefore off? What's with the base of the transistor tied to the case of the opto, which also seems to be shorting across both inputs of the LED? link
Declined, but clearly not in line with Be Nice, as it calls something (the post? The circuit?) a mess, which falls under the category name-calling (amongst others)
You've asked a bunch of questions about motors here in a short time. Try to actually understand the answers to the other questions before blurting out new questions. You have already been given a lot of information that it seems you haven't taken the time to absorb and think about. People here want to help, but not if you don't appear to be learning. link
"actually understand" is border-line, "blurting out new questions" is insulting.
Your question makes no sense because there is no standard "up" for a ethernet connector, and you didn't specify one either, yet you expect we know what you mean by "upside down". link
Could've been much worse, but yes, I think even saying 'your question makes no sense' shouldn't be allowed.
-1 for blatant RTFM failure. link
RTFM = Read The Fucking Manual. How that can be considered OK or even border-line, I really fail to see.
Note: all examples come from one user. I do not mean to pick on that user, which is why I didn't copy his/her name. It was simply because with this I could easily find a great enough comments pool to test with.
Note 2: since I flagged all these comments in a short timeframe, it's likely one mod reviewed all, so this test may very well not be representative.