How are comments displayed? Controlling display of comments.

[Zerokami]

If a lot of users post a lot of threaded comments how are they displayed?
Are all comments displayed without hiding or folding?

If I want to use algorithms for hiding or folding comments would I programatticaly have control over them.

Is there a way to add additional attributes to comments?

Would I have to create a the CommentsField() column code in mezzanine?

Is there an easy way to do it?