Might just be me but I've never clicked that button by accident. Maybe though UL should look into this and once they get handgun triggers moved to the neighbor's house, accelerator peddles implemented with a two step safety process and fast food drive-thru's required to deny service pending a note from your mother, they will pose some sort of mouse unintentional click revert procedure.
Not sure about you... but I don't have a problem where I click buttons that I have not already figured out what they are for.
I guess that If I really did have a burning wish to screw up my project I might just randomly press buttons and see what happens (or maybe even not bother to check... save my project... and then decide to have a public hissy fit when I notice what the programmers of Vegas allowed me to do).
Exactly what (who) is the problem here anyway? You are your own worst enemy.
Zippy's gotta be a troll. Only someone purposefully looking to start fights would forget that Undo works on that button, or would choose a name that reminds me of "Zippy the Pinhead" AND write just like "Zippy the Pinhead".