I absolutely agree. My husband and I have been hosts for about a month now with a very positive experience. We have indicated a security deposit. I've recevied about 4 messages from people looking to book our space but concerned that the deposit will be automatically charged to them upon booking. I've had to explain to them that this is not the case. Airbnb generally does a fantastic job of anticipating all questions in teh design of their site and processes, however this is one topic that has slipped under their radar. They need to address what the deposit is for guests, the terms, etc in a clear way.