Who the hell at Facebook did I annoy

For info; I don't even use Facebook. No machine in this house does.

Is this excessive number of hits due to be blocking the DNS and now it's trying to pound me in order to get a response back?

I'd also love to track what is requesting http-intake.logs.datadoghq.com. A quick search suggests that it's for diagnostic logs for apps, to report back to the parent company / developer.