Seacraft sinking question

[PeteG]

Hello, I new here and I'm glad I was driected to this site by one of your members. This is a great site!.
My question is how does one sink a Seacraft? I'm told by BW enthusiasts they can sink (BW purists driving me nuts)....... I'm liking Seacraft and would like to purchase a 20'. If a Seacraft is foam filled, I believe i read, how could it sink? Could they mean swamp? Did someone put too heavy an engine on? Could it have been a bad modification? How could one sink a self bailing open CC boat? I dont know, I never had a self bailing boat. If swamped would the boat roll with or without an arch or tower? I own a whaler Montauk and love the boat but dont want to test. I need a better, softer ride as I grow older. I want to know more and find my "classic" ride.
Thanks, Pete