I think beachcats are some of the most stable boats around. I went out in 18-22 knots yesterday (survival conditions for me) and we were able to keep the hulls down. In my old boat (Apollo 16) I would have spent the whole time standing on the centerboard trying to keep it from going turtle.
I do, however, think it is very unwise to go out solo in open water without being able to right the boat(even in relatively docile conditions). I know for a fact I could not right my boat solo, but I won't sail it solo in anything over 10 knots, and even then, I make sure I have someone around to help... besides SeaTow. I guess they can chalk it up as an expensive lesson. It's a shame it had to hurt so bad in the wallet, but at least they are safe.

-Rob V.
Panama City
Nacra 5.2