With the exception of the wdwfigment>tom_bricker thing (which I did solely because I *hate* the wdwfigment name), I don't think you're mostly right. I will freely admit that I've willingly brought a lot of attention upon myself and opened myself to criticism because of that. I have a blog and have been quoted as an "expert" in a few places, but I'll be the first to admit that I should not be considered an expert. I have opinions, and I happen to like them, but plenty of others disagree with them on very solid bases.
That said, I think "internet privacy" is an evolving concept, and one we'll continue to hear about in the next few years. Is Lou Mongello a public figure based on his social habits? Yes. Am I? Probably. Is Jane Doe who happens to express an opinion in a snarky way, which (unbeknowst to her) goes viral? I don't think so. While I don't like some of the flak I've caught on these boards, I can understand the basis for it. Point being, just because someone puts info out there online doesn't necessarily make them ripe for editorialization.
ETA: right, not wrong, in the first paragraph.