No, that was last night...
To answer your question, IMO, Keenly... it is the sense of anonymity as koosh and others have said. In the real world, there is fear... on the internet, there is no fear unless of course someone has personal information about you such as an address, etc... etc.
Here's something to ponder, which one are you? Needless to say I'm a Type-AB and have been since I knew of the two, it's where I feel comfortable and is just how I "operate". A clean mix between the two.
Type A individuals can be described as impatient, time-conscious, concerned about their status, highly competitive, ambitious, business-like, aggressive, having difficulty relaxing; and are sometimes disliked by individuals with Type B personalties for the way that they're always rushing.
They are often high-achieving workaholics who multi-task, drive themselves with deadlines, and are unhappy about delays. Because of these characteristics, Type A individuals are often described as "stress junkies."
Type B individuals, in contrast, are described as patient, relaxed, and easy-going, generally lacking any sense of urgency. Because of these characteristics, Type B individuals are often described as apathetic and disengaged.