I know some really good kids who's dad was dabbling in Calvinism, then died at an early age, so now they have latched on to it more out of honoring him I think, then out of their own thinking. My sons love these kids, and will win every single argument with them in classroom or outside, but they are intractable. I think they approach it out of fear and some measure of pride as well. I feel very sorry for them. I don't think it will cost them their soul since they obviously believe in Christ for their salvation, but it will cause confusion among those that they love and children they raise (not all of whom can be elect, so I wonder if they will tell them the bad news that some of them will be going to hell).