Not four days with no response, more like a few hours to resolve the problem with productive back-and-forth communication.
However, DigitalOcean again threatened to shut down the server later that evening of the 25th (automated email) because DigitalOcean support had not closed all the abuse tickets. Somehow it's my job to close the ticking timebomb tickets, apparently these tickets countdown to auto-shutdown of your Droplet if they're not all closed within an unspecified timeframe. Luckily I was online to click delete-refresh delete-refresh delete-refresh on the rest of the tickets or no doubt the server would have been powered off again.
The 26th and 27th, no problems.
Today (28th) DigitalOcean gets a pile more rapid-fire complaints and shuts off the server again, within 30 minutes of receiving the complaints. This time the complaints are bogus because I already deleted everything on the 25th.
What does that tell me? DigitalOcean did not check if the complaints were legit before powering off the server. All the URLs in the complaints are 404. It wasn't until Zach got involved that I was given some assurance the server wouldn't be auto-shutdown again in the event of more bogus complaints.