Shared medium (i.e. wireless spectrum) means anybody can do that, without being too conspicuous. A wire is significantly harder to DoS ;) (Plus I tried several

Shared medium (i.e. wireless spectrum) means anybody can do that, without being too conspicuous. A wire is significantly harder to DoS ;) (Plus I tried several solutions to do this; BT is not really well suited for proximity detection, teeming with false positives and false negatives)