Dave was already increasing his competition by helping the waster (assuming he's in the same area if he's trying to poach) something i think maybe only high earning established business' would consider. Makes you think twice , i'm about halfway to where i want to be and if it had happened to me and i'd lost say one of my rental companies work ,it would affect my turnover quite badly. Not a risk i think i would take.
In an ideal world of course i'd help anyone but you just can't rely on people being straight these days.
Name and shame him !