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J2ME uses the standard
Java security sandbox architecture, but of course the actual rules (permissions) are somewhat different from the standard JRE rules, since the VM is simpler and the hardware is different.
I would have thought that the emulator would be forbidding unsigned apps from using the Bluetooth services, though now that I think about it, I think that permissions are generally turned on in Java
test environments.
Sun seems to have a pretty good document on the mobile security setup. Have you read this?
http://developers.sun.com/mobility/midp/articles/permissions/
The secret of how to be miserable is to constantly expect things are going to happen the way that they are "supposed" to happen.
You can have faith, which carries the understanding that you may be disappointed. Then there's being a willfully-blind idiot, which virtually guarantees it.