What would happen if Android app is released with debuggable on?

Question

The golden rule is to set debuggable option to off prior to releasing your Android application to the public.

What would happen if I leave (forget to turn off) this

Answer 1

how would it manifest to a user?

A normal user won't notice the difference.

By the way:

Support for a true debug build. Developers no longer need to add the android:debuggable attribute to the tag in the manifest — the build tools add the attribute automatically. In Eclipse/ADT, all incremental builds are assumed to be debug builds, so the tools insert android:debuggable="true". When exporting a signed release build, the tools do not add the attribute. In Ant, a ant debug command automatically inserts the android:debuggable="true" attribute, while ant release does not. If android:debuggable="true" is manually set, then ant release will actually do a debug build, rather than a release build.