We all accept random facebook friends or Twitter followers - people you don't really know - like the guy you met at a party who "friended" you the next day. Most of the time these semi-strangers remain harmless cyber buddies, but online friendships can sometimes slide into cyber stalking. So here's how to handle some weird friend situations according to CNN - from harmless to potentially hazardous: * First, how do you handle the annoying person who constantly tweets at you, or gives a "thumbs up" to every picture you post? The analysis: They're probably harmless, and very bored. So, keep them busy. Ask for book recommendations, home decorating tips, and new smart phone apps. Hopefully they'll get tired and find someone else to fixate on. * Then there's the one who always instant messages you on Facebook. Again, they're probably harmless and bored. The fix: There's a feature on Facebook chat called "Go offline." Click that and no one will know when you're logged on. * So what should you do if you get a friend request from a total stranger? Click "ignore." In some cases, it could be someone who wants to keep tabs on you, using a fake name. A few years ago, it was all over the news when college administrators from Northwestern University went undercover and created fake student profiles, "friending" fellow college students as a way to sniff out underage drinking. The fictitious "Lauren Cohn" racked up 143 friends - none of whom knew her. She was actually a faculty member scanning student profiles! * Sometimes a harmless friend can turn into a cyber stalker: That's why you should never post your address, phone number, or whereabouts on Facebook or Twitter. Cyber stalkers will use the information to physically find you. Just ask the nearly 900,000 victims a year whose stalkers harassed or intimidated them with some sort of technology. The fix: Do NOT communicate with them in any way - even to say "leave me alone." Any contact from you will egg them on.Save emails, texts, and voicemails of every encounter, and keep a detailed log of the stalking. Then call the National Center for Victims of Crime at 800-FYI-CALL.