Well, I guess I can't dismiss it as an option. [As much as he would kind of like to, he can't deny there is a fitting story logic to the notion. As well as a 'hurt people hurt people' logic, or maybe a 'being a wraith isn't what they think it is' logic - what if it's actually great, and only the recently dead don't know it? But that gets into too many possibilities to mull over, so he shoves them all aside.]

As long as none of the options is 'shove people back in the mud', think away!

[Bones are not good for buoyancy, the clothing that usually cushions them just adds extra weight in that context, and trying to do it without the edge of blue magic at his disposal...? No thank you, he would prefer not to go swimming in any liquid much higher than his head again.