Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_3 like Mac OS X; en-gb) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5)
It's a bit hostile to give a warning for not following a rule I've not seen on any other forum. Consecutive post spammers can be a problem but most mods can tell the difference and deal accordingly. The anal approach on MR instead paints a picture of power-trippy mods.
Am surprised to have been warned. Bespoke and unique rules that are hidden away = bad user experience.