If I don't want my friends to see my comments on some business/company Facebook page, what I do to make sure they won't?
Same thing about Facebook Groups.
Finally, I think lately some Facebook applications surfaced that provide users using them with information on who visited their profile, viewed picture etc.
Aren't such applications against other people's privacy and against the terms of service of Facebook?
What can I do as user to make sure I will still be able to view profile, photo etc. of another person but he won't know this?