I favor disabling over deletion, and further, I would like to remove the ability to delete comments that have replies.
If that were implemented I would encourage users who desired to delete a comment to instead edit it such that no text remains. Unfortunately that wouldn't allow them to wash their hands of the entire debacle but it is better than nothing.
At 2011-04-08 LW user account deletion is broken. We (Trike) will fix it… but how should it work?
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