I have been suspended last week. No reason or previous warning was given, but presumably it was because of my activity on Tetsujin's answer to "What to do when my Mac is frozen?". Since it states that forcing a power off is the only alternative when a computer is frozen for almost any OS, I added comments explaining that, in Linux, neither is that the only nor the best alternative as long as there is a Sysrq key. Being Linux one of the few major OSes around, I found the claim to be innacurate and that no harm could be done by leaving informational comments.
After some exchanges, Tetsujin did not receive them politely anymore, claimed my point was an utter irrelevance and afterwards grew more offensive. Ten of my and his comments (according to Sathyajith Bhat), which I could not register and in which I tried to convey my message, were deleted by moderators. I noticed the "cleanup", repeated the Sysrq comment (numbered 1 below), because there is nothing wrong with it, and fearing the follow-up would be deleted too, I registered the remaining last five:
(... Unregistered comments. Moderators, feel free to fill in this blank. ...)
(1. Quasímodo) Forcing a power off is not the best option for a Linux system whose keyboard has a SysRq key. For example, if the problem was caused by memory exhaustion, the resource hog could be killed with
Alt+SysRq+F, causing the system would come back to normal -- a reboot would not be needed at all -- and unsaved work not related to the killed process would not be lost.(2. Tetsujin) Jeezus f christ. Shut up about a key that doesn't exist in a Mac. Really. Stop it now!
(3. Quasímodo) I have flagged your comment and I'll keep posting my warning. The question is about a Mac, but that does not give you any reason to say "so this is the same for almost any OS".
(4. Tetsujin) I have flagged ALL your comments & all are gone except this latest swathe of attacks. You are now dipping into harassment territory. Go away.
(5. Quasímodo) This is not an attack, this is information. Read these messages again to see who is harassing.
Upon re-reading the comments, I am still surprised I was the one suspended. I had only added information in the comment 1 (and in previous ones that I could not register before being deleted), but in exchange received some harassment and gatekeeping. The comment section of a user answer is not his property, it is meant for constructive criticism and minor/transient information. Yes, comments may be deleted at any time, but that does not mean they should be deleted or that well-placed comments should trigger a 7-day suspension.
Since the moderators ignored my now 7-days-old message requesting an explanation for the suspension, I would like to hear the community's opinion. Am I at fault? A fault which justified a suspension with no warning, and to not suspend someone who has harassed other users? To be honest, the punishment and comment deletion looks like shielding Tetsujin's answer from criticism, but I would prefer to hear from the moderator (I have tried) before jumping to a conclusion.
Edit
I take comment 3 back: The keyword "almost" is enough to make the question true. But it still lacks precision (what is "almost"?), which is OK, I'm not saying all solutions must be perfect and 100% accurate.
Still, I would like to keep the comment 1, which is also OK and does not try to falsify the answer, it is just extra information that clarifies what "almost" means there and guides Linux users.
Telling a user to shut up is unnacceptable. I have kept the discussion civilized and expect the same tone towards anyone.
I would expect moderators to warn users before applying a punishment, see point 6 in A Theory of Moderation and Penalty Box. Also, not ignoring the user if he asks why he was punished is fair.