Turn on Developer Console
Go to Options
Go to Keyboard / Mouse
Scroll down until you see "Toggle Console"
Link a bind to it such as "` or ~"2.
Toggle Console via through keybind3.
Paste in Command
Change the "key" to whatever key you want.
Press Enter to Proceed
Once you are satisified with the command you want, press enter.
This will make the key you want as the troll bind.
Have fun trolling!