A bebo stalking is the act of regularly checking up on friends/ex-girlfriends/co-workers in order to see who they are dating, chatting to, or just to see if they mention them (the stalker) in conversation.
The worst bebo stalking then involves messaging or texting the victim to harass them for their beboing activites.
Paul: The ex was texting my phone at 3am again last night, hassling me about my new girlfriend.
Andy: Who told her? We haven't even seen her. She must be bebo stalking you again, my friend.