“Kill” keyboard and mouse control when remotely accessing a computer from an iPhone?

Want to be able to temporarily stop any USB and/or BT external input.

Is there anything that would allow me to essential have a “switch” that would allow me to toggle functionality on/off?

Anything like this out there?

TIA

 

Is this even possible?

What I am hoping for is a little app that would let me click it remotely from inside the remote app, and wishful thinking it would be nice if it had a user settable timer that could default back to normal assuming something went wrong and it couldn't be turned back off, as well as the convenience of not having to remember to turn it back off each time.


Anyone heard of anything like this or maybe even a small apple script I could just run as a executable from the remote app?

Is there perhaps a better section to ask this question?

Thanks