As w ith email, beaw are when messages sent to a lot of people come in. The default reply option is to "reply to all". Don't click this unless you w ant ev eryone to read your reply!
You can respond to just one person by clicking the word "reply" next to their name in the thread.
Netw orks are groups of people (educational institution or workplace). You can adjust your privacy settings to allow or disallow people from your networks to see your various activities or information, so be aware if you’reamember of any particular network.
Be aw are that anything you post to group walls and discussions (or tag with a group) w ill beviewable by the other people in the group (and potentially by your friends). This all depends on the settings of the group, and your privacy settings. Just consider it public and be careful w hat you say.
By "liking" a fan page you're showing appreciation for the blog, product, organisation, political figure, company, activity or sentiment. I t will show up on your profile and you w ill see updates in your news feed and messages.
Question and answ ers are public, period. None of your security settings will stop these from being public.
When you ask your first question you’ll be reminded of this:
Note that you can unfollow your question at any time to stop getting notifications.
"Facebook Tips: Facebook Message Privacy "