I do not share your opinion that someone who is interested in a particular
technology has an obligation to follow every WG that might try to alter that
technology. First of all, it's not obvious which groups might do this-for
instance who would guess that the IPv6 folks would be working on a document
that affects how SMTP works? Second, there is just too much traffic on many
mailing lists to keep track of lists that are peripheral to one's interests.
This is a scaling problem, like many others that we face.