If you look at the right hand side bottom corner, you will find an icon "CHAT" with a green dot and a face, just click on it and go offline, you won't be offline but you will appear offline to others.. chill..
You cannot post to all the people on Facebook. It is a violation of the privacy settings of Facebook.
Server is down, server is overloaded with people and cannot respond, your being blocked (Either your own internet settings or facebook is refusing to connect to you), your internet sucks
If someone is sending you messages on Facebook and you cannot reply, the reason is because the person has that certain settings on their account so that only people on their friends' list can message them.
You can set your settings on Facebook so that only people that know you can find you and contact you. You can also make it so that your profile is private so people that you don't know cannot message you.
Some people set their settings so that certain (or all) people cannot see or post on their wall. Either that or there is a glitch, which happens.
Go to your privacy settings and change it according to what you want to show different types of people.
You cannot completely clear your facebook login email that is registered with your account. However, you can restrict your friends and other people from seeing your email address via privacy settings.
Facebook settings, then click privacy and you can go on from there.
Yes, I think they made an application for it actually. People can see your profile if you are over the age of 18 (I think) but you can change that in your settings.
You cannot make a private account on Facebook. You can create normal user accounts, fan pages, groups, and business pages. If you wish for people to not see your normal user account, you can set your privacy settings to who can see what on your profile. Simply click the Settings button at the top right of every Facebook page.
Some people have settings that won't let their friends post on their walls... You might want to ask your friend to change his/her settings. Hope this helps!
yes