Earlier quoted context omitted.
Oh god. I hate this attitude. Respect is a right, not a privilege. Why should anyone have to earn something so basic? Do we also have to earn our privilege to breathe air? We're all equals and equally deserve respect. Yes, even you after you muttered that banality.
Equals? Hardly. Some people, for example, are worse than others at English grammar--thus the OP. What does respect mean to you, out of curiosity?
A better question, though I will answer yours shortly, is what does equality mean? It's simply the relative value we assign something. The thing is, we can think in terms of valuable and not valuable or we can skip the duality altogether and see everything on an equal level. A spade is thoroughly unvaluable if you have no hole to dig yet indispensable when you do. So what is it's absolute value? Is it equal to a saw? Is one person equal to another? It all depends on your perspective.
The problem with seeing inequality between people in terms of respect is that you will treat some of your fellow man badly, since you don't respect them. If their value is merely a matter of perspective, which is ever changing, would it not make more sense to see past our biases and show everyone respect, whether they are equal to what we currently identify as respect worthy or not?
To me, respect means to consider someone in high regard. In my experience, how I look at people ends up affecting how they act. People always tend towards living up to the expectations placed on them. By showing someone that I don't respect them, I am pushing them down rather than helping them up.
Putting it another way, when someone is on the defensive, because someone else looks down on them and does not show them respect, they close up and are not receptive to new information. By showing them respect even if they are bad at something, they are likely to listen to what you have to say and change how they act as a result of your words. Disrespecting someone with - "you type like an idiot" or ignoring them, will make them respond appropriately. Validating their actions - "cool, a more condensed form of English!" then suggesting something else - "I've had lots of success finding a job by writing like this", they might actually change.
If we want society (and spelling) to improve, we have to embrace those we call idiots and teach them, not push them away.
If someone is an awesome programmer but can't write English to save his life, why not educate him? You'll certainly have a more loyal employee if he feels that he's gained important skills from you.
tl;dr - Disrespect is damaging, respect is nurturing. Respect everyone and the sun will shine brighter.