LJ oddness

So, riddle me this: Why do some folks start a second (or more) journal on LJ, and cease using their old one? Would it not be easier to delete old entries or make posts friends-only, depending on what you're attempting to accomplish?

For that matter, why do so many people monitor their "Friend of" list and get offended when someone they've never met has stopped reading their journal for reasons not stated?

Just random rants. Please continue with what you were doing.