not a problem unless you don't want to have your basses get covered in dust.
rubbish, the amount of force placed on the neck from the weight of the bass is nothing compared to what the strings are doing to it. Total myth.
I was advised against it due to the weight of the body constantly pulling on the neck. I just keep mine on 2 racks, no probs at all. Plus my wife wouldn't like having 10 basses hanging on the wall ;-)
rubbish, the amount of force placed on the neck from the weight of the bass is nothing compared to what the strings are doing to it. Total myth.