A lot of debate on another thread about playing in a dangerous manner.
It is specifically an IDFK offence and is NOT listed as a cautionable offence.
?
I think you slightly misunderstand IFABs intent in the vagueness of the laws. Understanding this is important in understanding the application of the laws.
USB is a deliberately vague term. It's not designed to cover every possible scenario, and the LOTG don't list everything that fall under USB. It's left this way so referees can apply it to what they deem a serious breach of the laws.
A seriously dangerous act can thus be sanctioned with a card.
You state that the LOTG don't specifically state that one could caution for PIADM; well, there's always been plenty of things the laws didn't state. In fact for a very long time they didn't specifically state that a bad tackle is a caution
Finally, as referees, once we know the laws, we work out how to find out how to apply them to different scenarios. Perhaps X passage in the laws doesn't apply, but we can argue for Y instead. Perhaps that's not the neatest, but it works. We use our understanding to
apply the laws.
You say that the LOTG don't specifically state that PIADM is a cautionable offence.
I say they don't specifically state that it isn't.
Having said that, the relatively new offence of 'tackles or challenges' 'using CRUEF' means one could argue the line between PIADM and a DFK offence becomes blurred.
If the LOTG specifically say you can't do it, then you can - just use your understanding of the spirit of the laws/game there.
And a highly, necessarily risky tackle would seem to warrant a card, whether or not it was at a player or near one, and whether or not contact is made. Part of the purpose of cards is a preventative tool, after all.
There are a number of things we caution for that aren't explicitly stated as a cautionable offence in the LOTG.