Only trust gateways that are worth trusting. When sending USD, BTC, Credit Card numbers, Social security numbers, etc to a gateway such as MtGox, BTC-E, BitcoinStore.com, Amazon.com, Citibank, you must trust them to be good stewards of your BTC / USD / Credit Card / Data / Products.

Why do you see gateways in ripple differently from a local bank, retaurant, amazon, etc?