I’m sure I have an illness, probably contracted through my PC.  I’m definitely not the only person with it and I’m surprised it hasn’t been identified before.  I call it Computer Literate Induced Tourettes or CLIT for short.  This is the malady where after an undetermined period of time the PC user starts to shout random insults and uses defamatory language at the inanimate object.  To the observer this seems wild and erratic, however the afflicted person cannot see any problem and the behaviour seems completely mundane.  In extreme cases it has been observed that an extended bout can lead to physical violence and destruction of the surrounding peripherals.  In many cases this is cruelty to mice which are seen to be repeated slammed into unyielding surfaces in an attempt to crush them.
In summary, this is a widely observed phenomenon which is spreading across the western world, it may already gave reached epidemic proportions.

http://www.cornwall-accomodation.co.uk/NWO/cornlang.htm