It's an intro post and not exactly formal.
It does not set a poor example but rather a realistic example. Often full capitalization is put in seemingly random places for emphasis, even good literature might have it. For example, Nineteen Eighty-Four has quotes such as "BIG BROTHER IS WATCHING YOU." This is also the internet where such a practice is common and is hard to avoid contact with.
I typed normally in my last few sentences so the contrast should be obvious. The capitalization catches your eye first and foremost. This does not mean I will be using that type of capitalization in all of my posts, but I think it is rather rude to criticize my post and not welcome me.
Regards,
The internet
P.S. Note my lack of indentation, will that bother you too? Another example of how informal writing can be.