Can I ask who here has actually had these experiences happen first hand as second hand information is dodgy at best (ever played chinese whispers).
I have flown in and out of Australia over 100 times and the only spraying that I have ever experienced was in 1999 on KLM and they use a pesticide which is delivered through the air conditioning so no people walking around with a spray can (though I have heard of this happening once to a friend flying SA from Africa), I definately don't recall anyone in space suits spraying out the cabin unless they did it mid flight while I was sleeping and quietly parachuted back to earth before we landed