As I said, this is a knee jerk reaction because China continues to encroach on HK and trying to slowly integrate it into the mainland. You are just making up unlikely scenarios to make it seem way worse than it is with little evidence to back it up except the usual China is bad line.
I mean you go from a school asks a student to stop doing something that they don't like(happens all over the world) that furthermore didn't even appear to face any consequences whatsoever and leap to they'll get students arrested because of the anthem law and you link that to one high profile star getting in trouble in China for misusing the anthem(again something that could happen in a western democracy) and link that to proclaim doom and gloom for HK. That's simply disingenuous and ridiculous.