By the time a kitten is 4 weeks old, they are typically 0.5-1 pound at by 8 weeks are 1.5-2 pounds. Would a BP strike at a kitten and a large adult possibly latch on? I suppose it could happen without proper supervision. Would I be worried about the snake "choking out" the kitten before I'd be worried about the kitten injuring the snake? No.
Either way, I don't recommend having a play date.