Explain to me how, if the community rules and standards are being ignored, A specific set of chat guidelines are going to solve the problem?
You are indeed right however, members could not follow the site rules. One of the prescribed consequences for not doing so is the removal of privileges. Maybe now that we are aware that a service can, and will, be removed if it is causing a disruption; we will be more observant of what is and is not appropriate.
also to clearly spell out what that is:
Disruptive activity includes, but is not limited to:
(1) posts that disrupt the topic of conversation or steer the discussion away from the focus of the topic,
(2) multiple posting of the same post,
(3) posting completely off topic messages,
(4) messages constantly posted in the wrong forum,
(5) messages posted in all-caps,
(6) harassment of any member,
(7) deliberate misrepresentation of another person's position,
(8) compromising the privacy of any member,
(9) inappropriate behavior towards any minor, and
(10) any other behavior that in the view of GA management is disruptive of the site or poses a danger to any member or author.
Pretty simple, and they can be applied equally to everyone, without the added headache of who is a chat "regular" and who is not.