It's been so long I had almost forgotten about this... there was also at some point a 3rd party camera app which had a secret setting (activated by entering some URL into iOS Safari), enabling the use of the volume buttons to trigger the shutter. When Apple found out, they banned the app from the App Store. Not much later, the iPhone's built-in camera app got that feature which we all take for granted now.
There was a time you could enter some url into ios safari and install cydia on the iphones in the apple store. They shut that inroad down pretty quick.
I remember watching a video of a guy doing that to a display phone at an Apple Store.
While that action was definitely not a good idea, it did encapsulate just how polished that jailbreak[1] was. The UX was identical to an App Store install page of the day. You tapped the price "FREE" and then tapped "INSTALL" and the phone would appear to install Cydia as though you had just used the App Store to do it.
