Typos or just can't spell?

Those who know me will not be surprised by this post. I only hope I don't make any mistakes! Look, I know people make mistakes, maybe have never learned to spell a particular word, or have fat fingers like me and mis-type a word. That's not a problem, but what I have an issue with is that very few people seem to read over what they have typed, especially on the computer. So many posts and emails have simple typos that should be easy to spot, even for the worst speller. Or do they see them and don't care? I know everyone's busy these days, but surely taking 10 seconds to read over what you have written, and make corrections, will not create a problem? In most cases, you can figure out what someone actually meant, but a lot of times it's virtually impossible to decipher. And don't get me started on punctuation. Please do everyone a favour and read over what you write before posting.