Hide that it was obfuscated by Smart Assembly

Is there a way that we can hide the fact that it was obfuscated by Smart Assembly ? If we use Reflector, we can see that it was obfuscated by Smart Assembly and what version was used.

Call me crazy but I think that's a security threat if the hacker knew exactly what we used to obfuscate it.

I really hope there is or if not, some way we may hide it.

Thank you