"Baroqin - and as such, they won't be employed by me!"
Don't blame you - I wouldn't employ them either 
You know I was never taught spellng and grammar at school - but one thing I was taught was written in the language which was appropriate for the person you are writing for.
So - if you're emailing a friend to see if you can meet up on Friday night to get pissed go for a drink, it's ok to say
"Hey, you busy on Friday? fancy meeting up. Let me know ASAP
Baroqin xxx"
if you're writing to someone to invite them out for a business meal you'd use a much more formal tone, with no slang.
"Dear Mr Blogs
I am writing to you to blah blah blah (obviously not really blah blah
))
I look forward to hearing from you
Yours Sincerely
Baroqin
The One person in the organisation who can't spell" 
Actually - surely the above is just common sense? But I know we were taught that sort of thing at school
I am writing to invite you to a meal blah