[jdm]

I created an account a couple years ago, but I haven't logged in in probably 23 1/2 months.

You can do anything unless an article is locked or otherwise disabled, last I remember. If you don't sign up before making edits, then everyone else who has signed up can see your IP address. Otherwise, I believe your IP address is hidden. At least, that's how it used to be.

[RatherBiased.com]

It’s still that way.