is it a coincidence that when i log on to facebook some of my friends log off?

[Colinc]

Yes big coincidence that all these people do not want to be on line when you are. Maybe you did something to upset them. Or they discovered how dishonest you are. The second part of your question proves that, as it is totally illegal to access other people's accounts for whatever reason. These accounts do not belong to the user, they belong to Facebook, who DO prosecute. And you just publicly incited others to conspire to hack accounts on a site monitored by every police and government agency, and with close ties to Faceook. Considering there are currently several people serving prison time for just that, not a good idea.