Ice is more dense than oil, so it sinks to the bottom of the fryer. There it turns into liquid water anathema immediately into steam. This steam needs at least 1000 times more space than the ice cube (1700 times more than water under normal pressure) and blows all the oil out of the fryer. I would expect quite a fountain. In a science fair experiment 10ml of water in a cup of hot oil gave a considerable fireball and a splash zone of about 1.5m. Dropping in a piece of dry ice (solid carbon dioxide) just made a little bit of a fizzle.

You can’t delete a mail you sent me, nor put your hand written letter to me in the bin. I can keep both and I can keep your name and addresses in my little black book. So there isn’t even that level of privacy in the real old fashioned communication.

And communication over the Internet was always the subject of storage. Your mail may be on the backup tape of a mail server. Your usenet posting is on archive.

So the assumption that the fediverse can forget….