The last time I did that, a couple of guys bridged across, then a couple more, and soon I was towing like 10 guys. We broke away though, and I kept on trucking. Most of them came around me with about 500m to go, but then died in the wind, and I kept on moving at the same speed and ended up taking third. It was a frustrating yet satisfying experience; I got robbed in a way (but, that's what I get for not jumping hard enough, eh?) but it was nice to see that sort of thing work out moderately well.
The only problem with doing this, for me, is the yellow line rule. I want to jump to the far side of the road and not give anyone any hope of a draft when I start my move.