J.K. they do fall out...but the aircraft is not a surgical  operating room...  the worst that could happen is that it could fall into someone's drink or meal....big deal...very easily seen.
It was a bad idea for  the Vice President of In-flight to advise FA's not to wear a poppy while in uniform.
Having worked for AC, I know many of the mangers and VP's are incompetent. They are put into positions that are above their capabilities and intelligence. As certainly is the case with this VP. This has always been one of Air Canada's downfalls. Over the years it has cost AC millions in erroneous firings and service decisions. 
With the embarrassment to AC this VP should be terminated.