Comments section feature: indentation guide

How do you feel about adding some sort of indentation guide/lines to the comments? It can be implemented decently and I believe it would help a lot. E.g. the horizontal dotted lines could go away in favor of vertical ones.

Example:

http://visualstudiogallery.msdn.microsoft.com/e792686d-542b-474a-8c55-630980e72c30