As to the window plug. I have been through the FAA course in OKC and tossed it once along withthe smoke evac slide lab and training there. They said, and it was Air Force policy when I flew as an Air Weapons Officer to keep the plug inside as they were more afraid of it becoming a hazard outside the airplane. Now granted on the old 707 E-3 I flew on we only had up to mid 30s max of people on board so the policy with an airliner could be different.

Obese people should not be allowed to sit there IMO. There are actually several types of incidents that are survivable as long as folks can get evac'ed. Think smoke.

Ciao,
FH