Not necessarily. The key thing to do in a situation like this is to submit both verifiable character references and a letter explaining the situation. You are going to have to provide a written explanation of why you thought that it was not a safe situation and be prepared to back up the claim, possibly with a police statistics or police reports. Having a proof of funds with your application that you have enough savings to pay the rent for several months will help too.
At the worst a landlord will say no, however, ones that say yes will likely ask for 2 months security deposits.
If you need an agent to help, I would be happy to help. I work with a lot of rentals and have worked with many families that have credit issues or other unique situations.