what I'm thinking, but better:
LJ has implemented a new feature that allows you to cross-post both entries and comments to Facebook and Twitter. Anyone who has this feature enabled may cross-post comments they make to friendslocked entries to these services. While the cross-posted item does not show the original locked post, it does indicate the existence of content some people are not able to see, which is a privacy concern for many in and of itself. Additionally, depending on what someone says in that cross-posted comment there are additional issues.
While I am perfectly aware (so don't start that argument with me) that privacy on the Internet and LJ is largely an illusion, people are entitled to that illusion. They are also entitled to being able to deactivate the use of such a tool that makes privacy violations seem easier and more appropriate in their own spaces.
Yes, you've always been able to cut and paste and link to content that shouldn't be widely available. If I thought you were the kind of ass that would repost locked content in a way that would clearly identify the source, you wouldn't have access to my locked content in the first place. If you want to quote your own comment on one of my locked posts elsewhere? They're your words and you can do what you want with them, but please do not post them with a direct quote of someone else's words, link to my LJ, or indicate in any way where specifically it came from. If I find that you have done it deliberately? Stop! Banhammer time! Public comments I suppose are going to have to be fair game, but I would greatly
appreciate it if you didn't tie my LJ to my Facebook account. If I want my Facebook friends to know about my LJ, I'll tell them myself.