I'd say she underestimated the sleaze she would face, which is far different from being unwise. Gentlemen don't behave that way, and in Alaska she's used to dealing with gentlemen. Governor Palin will learn quickly, which is what distinguishes her from the Democrats who keep trying the same foolish ideas without blaming their failure on the ideas themselves.
Underestimating the amount of sleaze she would face on the Internet?
The Internet doesn't care where you are. On the Internet, you are just as close to the NSA, Red Square, Watts or Berkeley as you are to FreeRepublic or Yahoo!.
People get their accounts hijacked all the time, even people who are not governors. If you haven't been mugged on the Internet, you just haven't been on it long enough.