Interesting. I've never had this problem with several types of Macbook and Magsafe, and I've never heard of anyone having that problem.
As I'm typing this, I'm trying to dislodge the L-shaped plug from my 13" Macbook, and it's truly impossible to do that by accident.
On the other side of the equation, I'm far from unfamiliar with tripping on the cord, but maybe that's just my clumsiness.