[nnfy]

Some forms of intrusion are more difficult to avoid than others; obviously that doesn't make it irrational to avoid as much as you realistically can.

Also, Facebook holds a significantly broader type of information than uncle Sam or T-Mobile. And Facebook also provides an avoidable vector for government surveillance. Analogy: no machine is totally secure, that doesn't mean we give up, turn off all security software and stop patching exploits.