It could be good for me. We ($work) have some embedded devices running BusyBox that we only have limited (i.e. non-root) access to. I'm looking forward for a way to escalate privileges on these devices as a result of this!
It would be a stretch, but lets say you're driving some poorly thought out automation over a pty that has some sort of terminal emulator attached that has any sort of output-changeable answerback-like sequence.
The pty part is important because some software will assume you're running interactive if it sees that its STDIN/OUT is a pty, and change its functionality accordingly.