I find PIADM a useful 'arbitrage' of a decisionCorrect. But, in fairness, the book gives a pretty unambiguous description of what PIADM is ie risk of injury or fear of injury. It's also a separate subject heading because (IMO) it's designed to cover those instances that fall outside the remit of the listed DFK offences and awards only the sanction of an IDFK. If it were down to me, I'd do away with the pointless IDFK and have every offence (including offside) punished with a DFK. It'd make life a lot simpler.
Players are not generally expecting a FT when there's no contact, so the announcement of 'IFK' indicates that I know the Laws better than they do
Every decision is different, but I'm just saying that I frequently side with PIADM