Why Do People Type Badly?

[Zaffre]

I've asked in the past, but never got a real answer. Why do people always shorten sentences and refuse to capitalize? "English isn't my primary language" isn't a valid excuse. If you want to type faster, my average words per minute with proper capitalization and punctuation is 79. Is it that people who dwell on the Internet want typing to be an easier task for them? I would like somebody to reveal the reason for people to typ lik this.

P.S. I mean no offense to any person reading this post.