Preaching to the choir, my dear.
But I try to ignore it. Lack of understanding of the finer points of style (writing style, that is) is common, and does not always indicate a lack of general intelligence. And although I do tend to value intelligence, it's not the only thing I value. People have many qualities to offer. So although the grammar stickler part of my brain might be screaming STOP THE EXCLAMATION POINT ABUSE, the nicer part is quietly reminding it to give the writer the benefit of the doubt.
On the whole, in fact, I feel the writing quality on this forum is quite high. The odd time I've scrolled through other comments on the internet (like, say, in the comments section of a YouTube video), my grammar stickler brain centre has apoplectic fits. Clearly not everybody learns to write properly in school.