"I must admit I find it painful to quote someone without an overwhelming desire to spellcheck, grammar check and punctuate their text.
I don't, it would be rude, but the desire is there."
Rude or not, if things are glaring, commas are missing, and a sentence is poor English, I will happily correct it before quoting it. After all, it was what was meant to have been written, and I'm just giving a 'helping hand'.
I don't remember anyone having a hissy fit about my altering it, then again, I would give short shrift if they did.
Rude? Consider it constructive, not rude.
The brain 'fixes' lots of typos for us, so we often miss our own mistakes (which then appear glaringly obvious on re-reading, or to a fresh pair of eyes, if one has a proofreader - found a university document about it, including errors for students to spot!)
"Its an internet forum .. It really doesn't matter "
Cannot agree. Say you had been an English Professor and for some reason became unable to leave your bed, brain working, body less so. Would you say that discussions online (assuming speech was impossible, and only via the internet were you able to converse) should have any less care ? How would the ex-Professor think if her students were incapable of stringing sentences together without correct punctuation, descending into text speak, and so forth ?
Just because it's the internet, a different method of contact, doesn't mean standards and quality should be allowed to drop to zero.
Ever written a letter to the editor, or made contact with any organisation, via e-mail ? Would you go about it in a haphazard way "just because it is via the internet" and that you have no need for punctuation, capital letters, new paragraphs ?
I sincerely hope not, and doubt you'd take any less care than if you had used a typewriter in days gone by - you'd be succinct, to the point about your request / complaint / suggestion and take care not to have simple errors, lest the correspondence be binned on receipt as "worthless rubbish" (I really pity anyone having to read covering letters submitted with applications for jobs these days, if they are sloppy because "it was via the net").