@adrienne I've seen local fire services here (East of England) spreading the same message.
In-laws clearly haven't paid attention to the warnings, they babysat our 3 year old last night & when they put her to bed they left her door open - and risked waking her up by watching the tv turned up too loud, and going in & check on her
I promptly shut her door, but heard her coughing half an hour later and went into her, then found they'd also left her in her dressing gown - which was twisted around her chest, with one end of the belt over her shoulder
Got that off her & she slept soundly for the rest of the night.
(Not totally surprised though - they're the same people who once complained to OH after I got pissed off at them, telling them for the third time in 3 days not to put the kids in car seats whilst wearing thick winter coats...)