I’ve never had problems with Visa or Mastercard cards at any merchant. I’ve always paid with cash and I have never been asked for any identification.
The Simon gift cards require a $2.95 activation fee at the time of purchase, which is regardless of the value that you place on the card.
This is a version of Mozilla Firefox that has been tweaked for privacy, and communicates solely though Tor.
The Tor Browser is available for Linux, OS X and Windows.
These stores will usually have a rack somewhere with a wide selection of store-specific gift cards, for places such as Amazon and i Tunes, as well as calling cards, prepaid cell-phone cards and reloadable debit cards.