Velocity Macro sandboxing issue

Take this use case:

1/ A page A in wiki 1 defined the macro #livetable which is also defined in macros.vm
2/ A page B in wiki 2 uses the macro #livetable

Visit page A in wiki 1
Visit page B in wiki 2 -> the livetable macro used in the one from wiki 1

This use case also works in the same wiki but is particularly annoying in multiwiki as wikis should be sandboxed.