i did have situations in the past, people would show up at a coffee shoppen announceded. i didn't realize i wasn't really using the privacy setting in the right way. you're absolutely right, katie. here's my thing. when we talk about technology i'm not here just to explain how to use the stuff. i really want people to understand how to leverage technology for their person life, business or organization. you hate kit a key point. do not broadcast this information out unless you really know who the friends are and don't link your account, your foursquare account to twitter or facebook, because that broadcasts you further. if you want to give somebody the keys to your house, if you wouldn't, they're probably not your, "friend." >> thank you so much, mario. we love having you on. >> my pleasure. >> join us every saturday at this time as our tech goo rur mario armstrong give us the scoop on the latest technology. >> just like every weekend, i have no idea what mario was