Uh, no.
Just wait for Pixar’s The Incredibles to come out next month, and you’ll know why capes are sooooooo out…
And don’t secure your mask to your face with just a bit of string—it could very easily be pulled down over your eyes, even by accident, leaving you half-blind in the heat of combat. Use spirit gum to attach the mask directly to your skin, instead.
And don’t wear one of those little domino masks if you expect to maintain a secret identity. Particularly if you have a job where you deal with the public a lot, or are well known, like a millionaire playboy.
(Of course, if you’re female, a wig will do.)
Here’s a place to go if you try supervillainry.
I was thinking more along the lines of a radioactive bat.