Perhaps not a biggie but common manners should guide them that they give you the other guys number and if you want to call him then yay. Generally it's wrong to hand out others details. On the plus side it sounds to me it's in your favour to get out there with some like minded people.
Edit: Could be you are the only one with a genius dealer, most of us are p!ssed off with them.
Edit: Could be you are the only one with a genius dealer, most of us are p!ssed off with them.