The whatsappia disease!!
1) waking up in the morning and the first thing you do is check your whatsapp!
2) checking peoples "last seen" and judging at what time do they sleep/wake up!
3) stalking peoples status and wishing that you could have the same one!
4) checking out a friends profile picture for a rather long time!
5) continuously checking a persons "last seen" if he/she hasn't yet replied!