How to disable the new copy/paste protection in XFCE?

My desktop environment/window manager (XFCE) in Debian has sadly, suddenly started asking me if I'm sure I want to copy/paste into my terminal.

Yes. I'm sure, always.

How do I disable this fantastical technology, with XFCE specifically? Debian 9.9, if it matters.

This is new "feature" of xfce4-terminal.

Go to Edit > Preferences > General tab and uncheck "Show unsafe paste dialog".

Another answer here explains how to handle this issue through the GUI. However, if you need to do it in a script or from the terminal itself:

echo "MiscShowUnsafePasteDialog=FALSE" | sudo tee -a /etc/xdg/xdg-backbox/xfce4/terminal/terminalrc