Secured to unsecured

Ok, so after some Google searches, I've come to a conclusion that once you've applied a user-level security to a DB, you cannot reverse this. I haven't seen anything here about it, nor any responses to that specific inquiry. So should I stop looking? I know most wouldn't want to go this direction, but unfortunately, I secured it, put it in operation, and continued to develope it further. Doesn't make for very good distribution preparation .
Anyway, thanks for any help past and future and keep up the great inputs, I'm always amazed at some of the answers/solutions you guys all put out there.
Jim