By now, everyone knows — or should — that it's unwise to post embarrassing photos of yourself on Facebook. You never know who will see them, and that can result in all sorts of horrific scenarios: A potential boss sees a shot of you drunkenly dancing with a lampshade on your head and doesn't offer you the job; a boyfriend sees you making out with another guy and dumps you; your teen son and his friends spot pics of you modeling lingerie with your girlfriends, causing him to be mercilessly teased for weeks.
But maybe a bigger issue is posting unflattering photos of other people on Facebook. You might think the shot of your buddy shirtless on the beach is funny — hey, look at that beer gut! — but chances are he won't. What if you look great in a group shot, but a few of the other people don't look so hot? Don't post it. Or ask the others in the photo if they'd mind. And speaking of asking permission, that's a must if you want to slap a photo on your page of a person who isn't on Facebook. Ditto with kids.