I don't see why you (or w3schools) would object to a warning being shown on that page. It's put forward as an example, it shouldn't be treated as real and somet

I don't see why you (or w3schools) would object to a warning being shown on that page. It's put forward as an example, it shouldn't be treated as real and something requiring security, so showing a generic warning confirming it's not secure is perfectly harmless and even expected