`No drop' is really just a goal. If they're nice, they'll do what they can to avoid dropping you, but it may still happen.

Ultimately, if you're the slowest guy, you tend to be at the back where people can't see you, and if something goes wrong (like you get caught at a light or drop something or whatever) you can easily be dropped and they can be long gone before they're even aware of it.

Face it -- if you're the slow guy, you're likely to get dropped occasionally, even on no-drop rides. Even by nice guys who don't want to drop you. The best defence is to have a map of the ride and a cell phone along with the number of a few guys riding. With the map, you can continue on the route and catch them at a break (or where they stop wondering where you went) or perhaps you get a short cut and catch up to them that way. Or with the phone, you can just call and ask where they are, ask them to wait up ...