The use of LOL via email/SMS/Facebook/Twitter etc all the time no matter if it's in context or not - So serious that the user doesn't even know they use it.
All these show LOL Syndrome -
Facebook status - Joe is having a drink LOL
Email - How are you? LOL
SMS - I'm not too bad, had a car accident LOL
Twitter - Why are there so many adverts LOL
the ability to take away the seriousness of ANY text conversation by adding lol, lmao, rotfl, etc.
Prime Examples of LOL Syndrome
ex 1- "da doc called...i mite have pancreatic cancer lol"
ex 2- "omg my bffl nd my bf have been seein each other bhinf my back lmao"