We call that "cowboying" a horse, and in some instances, will get you forcefully yanked off of the horse by an owner or trainer because of the excessive-ness of it.
But, if it's your horse, you ride them the way you will. I know a girl who's all spurs when she rides her western horses. She gets bucked and horses try to shoot out from under her. No one approves, but because she owns the horses she rides, no one says anything.
We just shake our heads and roll our eyes when her horses start bucking fits under her.
I used to jump a very lazy Appaloosa. I needed spurs to keep him at a consistent trot. But as always, step it up. Squeeze to go. If the squeeze is ignored, gentle tap with the spurs. If that is ignored, tap the bum with the crop. I wear heinously long spurs (2 - 2 1/2" long) because I usually ride horses way to short for me, so I always exercise extra precaution with my spurs, because there is an extra 2 inches behind my boot that I need to be aware of, or I'm digging painfully into a horses side.
Usually, extra work with WTC transitions is very helpful when asking a horse to step up to a canter as well. You may also want to pay more attention to your position too, and make sure you are not off balance and getting in the way of an upwards transition.