Presenting one of the classic hacker’s tools:

Wiki article on phone phreaking for the uninitiated. The short version is that this whistle could be used to reproduce the tone used by phone companies to initiate a long distance phone call back when dialing long distance could be downright pricey. These whistles were used to make long distance phone calls for free.

Irl the hacker will have knee-high socks and cat ears

Bruh.

But also: https://www.youtube.com/watch?v=qpMvS1Q1sos

GTA V got it kinda right, with Lester and Jimmy