When done correctly, drafting anything isn't all that dangerous. You don't want to put yourself in the middle of the drafting vehicle's path... following the right side tire path is enough. Nor do you have to follow within a couple of feet of the draft vehicle... several feet is enough depending on the speed and size of thee vehicle, you'll be able to feel the start of turbulence and adjust accordingly. With this practice and having your brakes covered, staying alert and monitoring the road/traffic conditions beyond the right side of the vehicle, you'll most likely be prepared for most emergency situations.

There's a long stretch of road where I live that is heavily traveled by roadies on the weekends. If I'm riding it on my motorcycle I usually get a few drafters in my wake and adjust my speed to keep them in my draft. It's a kick.