"How about the saying, less hast, more speed and if one can't do something properly, then don't do it at all."

Yes dear, how about it?  If you cant communicate with people properly,  in a civilized way,  dont do it at all. Silverblade did no harm to anyone, you do, you are very offensive and hurtful.
As he explained, for him to avoid typo's is hard due to reasons beyond his control. For you to be understanding shouldnt be hard, and it is under your control.

"Yes I will ignore what Sliver Balde (I mean SilverBlade) " has to say if he doesn't consider me worthwhile enough to communicate as an Adult."

As I said, I can spell properly if I want to, but I think content is more important than polished spelling. I have my doubts if you're human let alone an adult one.

"Don't forget that he lives in the UK and that English is his first language. If other non English speaking people can communicate properly in English and get it right, then why can't he?"

He explained why. Who nominated you as judge and jury whether his explanation is acceptable?
I dont always agree with what he says, but I'd much rather read what he has to say than take notice of self nominated 'what's proper' supervisors. I'm sure I'm not alone in these point of view.
'Communicate properly'  is a matter of making connections with other people, contributing to their lives. It's about  caring how your words affect  the people you talk to, not how they are spelled.

Spelling is just a matter of convention not a holly commandment.
Are you going to ignore all Americans too because they dont spell the proper British way?

In circumstances like these, Oh how I wish we had a moderator...

"I paint that which comes from the imagination or from dreams, or from an unconscious drive. I photograph the things that I do not wish to paint, the things which already have an existence."
Man Ray, modernist painter
http://artpearl.redbubble.com/