What's everyone's thought on "IFR Taxi" and "IFR Departure". The AIP doesn't say much about those either, does it just come down to a courtesy?
NO! It clogs up the airways with extra calls. If ATC wanted us to give them a "warning", then AsA would put it in the book. And obviously, "standing by" to give your departure report is silly because it also serves as a broadcast to Dick and his VFR mates who may be in the vicinity.
"IFR Taxi" "Taxi? I don't see any taxis around here, let alone an IFR one".