Unfortunately, Reddit has no mechanism for archiving or 'marking' individual comments (or threads, for that matter).

Furthermore, there's simply no way for the mod team to verify anecdotes. That's the thing about them: they're a single person's personal experience. In one of our earliest Rules Roundtables we reproduced a post from /u/American_Graffiti that goes into great detail about the problems with anecdotes, generally and on Reddit specifically.

FYI, that's not actually the rule -- that's just the template we usually use when removing anecdotes. The rule actually reads:

No personal anecdotes

Personal anecdotes are not acceptable answers in this subreddit. They are unreliable, unverifiable and of very little real interest. For further discussion and explication of the rule, please consult this Rules Roundtable.

The RR in question is this one, and it rests on six main points:

• First, people's memories are unreliable; it has been repeatedly, conclusively demonstrated that human memory is not a process of recall, but rather a process of reconstruction and association - people will very often "remember" the past in a particular way because they think that's how they should remember the past, or because they have already been exposed to specific narratives of the past which they feel their experiences should conform to.

• Second, anecdotes posted on reddit are too far removed from the events they supposedly describe.

• Third, we must be able to contextualize primary sources.

• Fourth, we can't trust redditors.

• Fifth, no one single source is really of all that much use.

• Sixth, (a more practical consideration) - everyone who was alive at a given time probably has a memory of that event.

I would urge you to read the whole roundtable and discussion about anecdotal evidence. Thanks!