Yeah, the big concern here is being fixed to an object that is going to greatly increase the amount of resistance against the kite. You towing people behind you that are going to MOVE is just like people attaching a second buggy behind them on the beach. Do it all the time with no issue. Now, the problem becomes when the things being towed suddenly come to a stop... then you'll be in trouble, but as long as they keep moving, its all gravy.
