Riding where it's hot!
Used it last week to keep my speed at +/- 70 mph in a 65 mph speed limit because of accompanying fuzz. So many cages were going faster, he wasn't after me.
I bought the 2wheelride.com throttle lock a couple weeks ago after seeing the link on this thread. It really works great. $20 with free shipping is about as low cost as you will find for this kind of solution, but the best part is the 10 second installation with no tools. I had previously put together a pipe clamp with a thumb screw to work as a throttle lock, and it worked, but was inconvenient because you had to turn the thumb screw a number of times to get it enough tension to hold the throttle.