Having watched the video, I don't think this is going to work on motorcycles. It needs to stick to a roughly-flat/vertical surface. If fired at a bike, it may hit the tire (which obviously won't work), or it may hit the rider's clothing (easy to ditch - although if push came to shove, it may have the rider's DNA on it). The license plate or the back of the bodywork are really small targets.
Besides, I am quite sure anyone who gets this stuck to their vehicle just needs to find a place to stop, yank the thing off and toss it, then disappear.
If the cop is close enough to make this stick, they're close enough to read a license plate.
It will work in some situations ... but not all of them.