

It’s common practise to test each other’s commitment and preparedness, China vs. Taiwan, China vs. Australia and New Zealand, North Korea vs. South Korea, North Korea vs. Japan, USA vs. everyone, Israel vs. all neighbours, etc. etc.
One day humanity might grow out of this childish behaviour, but not in our lifetimes.
Well, unless you’re talking about a different transponder, the Marine Traffic sites all show that the oil tanker that was hit was at anchor and her location is still being reported live by the transponder onboard.
I also am fairly sure that there are heavy fines for turning it off, but I’m not a mariner and don’t pretend to be one on the internet.