Speaking on the internet is to mold whatever version of English you speak into a pseudo US English so that Americans can remotely understand what you're saying as they're a very very prominent portion of people here. Sometimes I don't care, sometimes it's annoying.
It's particularly annoying when you're like, speaking how you normally would, and then an American would pop in being it "bo al wa er" and "chewsday innit".
if an american does this to you, simply reply "howdy pardner ah reckon" to make them so mad as to render them incapable of further speech