On a recent road ride I was barely caught by an older dude on a road bike. I was riding in the drops at or above 20mph. He caught me and in a panting breath said " Hey, Hows it going?!?!? " I glanced back and said "Just fine" just as he began to draft me he over lapped and bumped my rear wheel.
I instantly faced forward and sprinted for the next 5 minutes at 25 plus mph.
Not cool man, not cool at all.
I don't draft in order to get more out of my training rides.