Originally Posted by
MikeWMass
Wrap a rag around the seatpost thickly enough that the clamp is tight enough that it won't spin
With the caveat that you should be extremely careful when clamping a dropper post and the rag should be clean so you don't introduce any nasty stuff or scratches to your dropper.
Wireless droppers are great because you can just remove it and put in a cheap-o rigid seatpost and clamp as you wish. Not saying that is the reason to get one but it is a nice benefit. That being said I won't give up my Thomson anytime soon.