The last two winters in Europe has seen thousands of flights operating on runways covered in various agents used for snow/ice removal, all without getting filled with smoke.
I've heard of aircraft getting smoke in the cabin because they forgot to turn off bleeds during aircraft deice, but never because of agents on the runway.
It's certainly not a Boeing 737 procedure to switch off bleeds when you land on a "winter runway".
Job well done, IMHO.
