This question was formulated after there was an extensive amount of commenting on the following question:
Basically what happened was that the question was kind of vague and nearly all sub-questions were duplicates of existing questions. However, after extensive commenting with the PO it actually matured into an excellent question (from my point of view at least).
Anyway, what I did was deleting most of the comments on my end, leaving a few key comments in place that more or less contained the most important comments. However, a set of answers of the PO to my comments were still left in place. These comments on my comments were therefore also obsolte, as they basically answered a question that was deleted.
I decided to do remove my obsolete questions based on my previous question on Meta: what to do with obsolete comments
However, @CRags later commented to me that I perhaps should have flagged the PO's questions for being obsolete, as they make no sense with the deleted corresponding question-comments from my side. However, my reasoning is that folks (PO in this case) should be aware of their commenting and remove them themselves.
So my question boils down to:
After deleting my own obsolete comments, should I flag obsolete comments from others (e.g. PO), thereby promoting a clean Bio.SE but placing burden on the moderators?"
On a side note: somehow all of the comments were deleted in the end -- Was this moderator's work?!