Woz is known to have fooled around with RF jammers. He was quite a prankster. Most of the hackers I tell the story to have either already heard it -- and smile approvingly, or find it terribly amusing.
If we define the term "hacking" more broadly even Wikipedia's history is wrong/limited. Hacking to me has always been the process of dissecting something and figuring out how it works. I would imagine there were lots of hackers even before radio came around.
We are the original hackers.