Wax has a good question.

[cimorene]

[Poll #1147218]

Comments

[kyuuketsukirui.livejournal.com]

I think there is probably quite a bit of #1, as well as perhaps, not actually new to the internets, but just really technologically challenged, so they don't know how to turn off smart quotes or they don't realise that on a monitor paragraphs need line breaks separating them to make them legible.

But I think it's mainly #2. I mean, if someone doesn't realise that sentences need commas and periods to make them readable, why would they be able to tell what formatting would be bad or good?