Hello all, as time has moved on and I've learned a few things, and the system has changed, I'd like to refine my criteria for flagging posts and place them all on one post that will be handy to read.

I'd like to think that these are uncontroversial and mostly objective criteria, but I'm sure there will always be those who disagree. On with the criteria!

Tag Abuse:

Tag Spam: This is much less of a problem now because the interface limits to five tags, but if through some hackery a post ends up with dozens of tags, it will be subject to flagging.

Incorrect tags: Sadly, still a huge problem. An incorrect tag would be posting a sexy girl picture in "bitcoin" or posting an article about bitcoin in "introduceyourself". You are placing the wrong material in the wrong place.

Plagerism:

This is posting material from some other source and claiming it as your own. You should always give credit and site your source and preferably link to the original material. I've being doing more of these lately, @cheetah has been a great help!

Duplicate posts:

This would be reposting the same material over and over again. I'm not going to flag for this very much. If you really want to waste all four of your daily posts on the same thing, then that's your own problem.

There are many legitimate reasons to repost the same thing. Steemit doesn't have the concept of "sticky post" where a post that's deemed particularly important sticks around to be read. Some important groups, like MinnowsUnite post their advertisement every day. I'd have to be a real jerk to flag those.

However, if someone keeps reposting their introduction to #introduceyourself, over and over, I'll definitely flag those. You don't get to re-introduce yourself more than 2 times.

Blatant Begging:

Please try to provide some kind of value in your post. Don't just ask for upvotes or money. Don't post a silly, no effort post saying something like "Whales place vote me up! This post is worthless, but vote me up to prove that a worthless post can make thousands!" Two exceptions: if you are asking for money for a legitimate charity then that's fine. Tag it properly! Like #charity or something.

If you absolutely must beg, then use the #beg or #begging tag, and don't use any other tag.

Fraud:

This would be any post using falsehoods to garner money and support. A good example is identity theft, where one is impersonating a famous individual or a really attractive woman in order to lure in the upvoters. Typically you ask for a (non-photoshopped) verification picture of the person holding a sign saying "Steemit" with current date.

Universally unacceptable material:

Yea, this would be things like child porn, threats of physical violence, NSFL: not safe for life posts, the really really bad stuff. Indeed, these things would require more than just a mere flag, but flagging is where I would start.

What I don't flag for:

I wouldn't flag a post just because I don't like it, or am not interested in it.
I wouldn't flag a post about the tiananmen square massacre or one that shows the nazi swastika. It's not my job to act as a censor for some government.
I don't flag porn as long as it's properly tagged with #nsfw and #porn tags.