How Much Security Deposit Is "Enough"? One Month? More?

[John Thedford]

After having recently being burned by a tenant that didn't pay the last months rent I decided to raise my security deposits. Previously, I was charging one months rent amount. Now I am charging about $500-$600 over that. I just put a tenant into a property that rents for $1095 and charged $1600 as a security deposit. I hope this will stop a tenant from telling me to "keep the security deposit" in lieu of rent. As long as I do this with all applicants then I am not discriminating against any single applicant. Do other landlords use a similar tactic?