Social media and Bluetooth played a role in the Arab Spring [1]. Your average spy movie or series (I am currently watching The Americans) contains loads of [fictional] examples. Some other examples: SSH over Tor to get around firewall(s). USB sticks in concrete as a means of a drop point.
And what is fiction, might become reality. Just a matter of how far you wanna look. Snow Crash pretty much described Second Life or MMOs with the Metaverse. Plus, I remember around 2000 a joke IIRC called the iBrator. It was a remote, internet controlled vibrator. Back then it was an April Fool. Look where we are now? You can pay to make a person's (most likely a woman) vibrator vibrate, live, over the internet. You can call that an unintended consequence of the internet, USB, video conferencing, javascript, or what not.
I'm not certain if those count. Bitcoin and Tor were explicitly intended to circumvent government controls. The creators surely knew that meth dealers and child pornographers would use them; they just felt that the benefits were worth the cost.
And what is fiction, might become reality. Just a matter of how far you wanna look. Snow Crash pretty much described Second Life or MMOs with the Metaverse. Plus, I remember around 2000 a joke IIRC called the iBrator. It was a remote, internet controlled vibrator. Back then it was an April Fool. Look where we are now? You can pay to make a person's (most likely a woman) vibrator vibrate, live, over the internet. You can call that an unintended consequence of the internet, USB, video conferencing, javascript, or what not.
[1] https://en.wikipedia.org/wiki/Arab_Spring