Easy remedy is to use a spell checker. that's what I do.
If you post has numerous spelling errors, what am i supposed to think? Do I assume that you just don't know how to spell, but nevertheless you are brilliant?
If I see numerous spelling errors, does this suggest that you spent a lot of time crafting your remarks? Should I even think that you took your text seriously at all?
I find spelling errors annoying because I have to try to assume what the person is trying to say, and in many instances, I just cannot tell what they meant. Why am I annoyed? Well, this type of post usually doesn't get a response from me at all, but it wastes my time, because I cannot merely skim through it; I have to stop and try to figure out what the post actually means, and this is frustrating. I often just do not know what the person meant. When I do, I'm still annoyed because I've just wasted a lot of time trying to figure out what the writer meant, when they could have made my task a lot easier if they just had the common courtesy and consideration of others to do the cleaning up of their atrocious spelling themselves.
If you think it's okay to write stuff in a hurry, assuming others will just figure it out, you really need an major attitude adjustment. Nobody is going to take the time to wade through a post that has poor spelling and grammar. Most of us just roll our eyes and move on to a post the writer cared about enough to make sure it was right. So you see, you have a problem you didn't even know you had: most of us are NOT leaving you spelling corrections; we just stop reading if you have errors in spelling or grammar.
Do you want to be taken seriously? Use spell check, and use Grammatik or learn about grammar so you can avoid the worst of the mistakes at least.