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My inability to get the point of Facebook continues unabated. I keep getting Facebook-generated LinkedIn-generated e-mails telling me that someone, even people I don’t even know, have “endorsed” me on Facebook LinkedIn. I also get e-mails from people asking me to “endorse” them. What is this about? I ask rhetorically, because for me, Facebook is and always has been more trouble than it’s worth. [UPDATE: A friend points out that the "endorsement" thing is a function of LinkedIn, not Facebook. I hadn't realized LinkedIn -- another useless online thing I got involved with for some reason -- sent out this sort of thing. Which tells you how much I pay attention to LinkedIn. Anyway, that doesn't obviate any of the points I...