You're missing the point. TorWallet isn't appealing because I enjoy giving money to some random stranger. It is appealing because it is a quick-n-dirty throwaway wallet. I only had a small sum stored on the service, mostly to test it out because I was curious.
That being said, there are ways to run this type of business while providing some reassurance to your users that you're not going to run off with their coins. If you are going to start a service like TorWallet, you should be willing to make your business more transparent. This includes putting actual contact info on your site, including your name, an office address, and a phone number. If you're a one-man operation, contract with a call-center service at the very least. Just because your service is only accessible through TOR and your users wish to remain super-anonymous, doesn't mean you need to keep your identity hidden, Mr. TorWallet.