Man, I hate it when people do this. No offense to you, of course--and I'm sure your advice is backed by good data and provably worth quite a bit of money--but man do I hate it.
I can't tell you how many times I've been looking at a post and tried to find the date, whether to figure out what version of a product someone was likely talking about, or to cross reference against some other post, or to consider the post in light of other events at the time.
I realize why it's done, and I realize that this is another one of those "you are not the typical user" issues, and all that. But it's still frustrating.