Imposters are amazing, but they can clash with many creative and interesting effects world creators can use within VRC.
Projectors and camera effects show them as opaque, or invisible. Often times imposters generate impossibly huge, ruining experiences for everyone in the space when their outside bounds are visible.
Please give us the freedom to disable them per-world, or even per-instance. Giving this option to world creators would expand creativity, and would not complicate the end-user experience any further.
Alternatively, give imposters their own unity layer so they can be rendered separately.