1- if your wireless they may have got ya..I guess the new thing is they are cruising neighborhoods and jacking the wireless info flying around, I knew this would become a issue and stayed hard wired here.
2- I think they used to only require a card if you wanted to sell but did not if you wanted to buy only, they may have changed that policy, its only so they can get there listing fee's without chaseing you around for payment, pretty harmeless.