Yes, you're right, this time they didn't try to delete. I read the comment, I understand what happened.
Why should @bmelton expect Facebook to respect the notification settings after he has evidence they didn't respect the account deletion request multiple times?
It's not weird nor is it magic to expect Facebook to stop the notifications. That's what pretty much all other web sites and services currently do. They may ping you several times, but eventually they will stop. I know because I run a service that does this, and I pay attention to what other services are doing, and I care about what is socially acceptable. Facebook, unlike other services, ramps up their notification schedule when you get quiet, rather than assuming that no contact and no response after multiple attempts means you don't want to use their service.
What Facebook is doing is what's weird here.
Elsewhere in this thread, @wpietri makes a compelling argument that were Facebook a person in your life, the increasing notifications would be considered very annoying and needy. This is the reason it's weird for a company to do the same thing.
https://news.ycombinator.com/item?id=15392947