Just a friendly community-service message:
I have noticed many extended discussions happening in the comments to some posts (and to be fair, SE's automated Mod tools have raised a few flags on their own). While I can certainly take part of the blame (I have myself contributed to a few endless comment threads in the past), I should still point out that this use of comments is not encouraged.
As much as possible, when your comment has potential for becoming "controversial" or leading to long discussions (I think by SE standards, anything more than one or two back-and-forth is "long"), please consider using Chat rooms!
Chat rooms work practically the same as comments: participants do not need to be logged in at all time, conversations are saved and can be resumed at any time, when a person logs back in. Depending on the type of conversation, you can either use the main public chat room for JLU or create your own room (and keep it private or make it public).
SE provides you with tools to easily migrate a comment conversation to Chat (don't forget to delete previous comments that are no longer necessary on the entry), but don't hesitate to flag a comment thread if you'd like moderator help to move it to chat.
In addition to the "SE rule" aspect of all this, I think it might have a nice impact on the social aspect of JLU (even though this is not its main design, I think it's clear there is a sort of informal community of JLU users: chat rooms are designed specifically to encourage this aspect)...