I was the admin of a small social network for many years, and I understand the message @dang was trying to convey.

If you were actively commenting, you are basically asking to break the flow of discussion among many participants. And yes, this is unfair to others.

My rule of thumb was to honor the deletion requests for those who were little involved in the community.

For others I would disable their account, anonymize their login name and remove sensitive details in discussions.

This is how it worked until toxic behaviour, facebook and telegram made my little social network redundant.