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It is kinda happening. Check out Citadel Connect. It will shed a lot of light on your theory which is very plausible.
Using the Dark pool trading and other ATS systems will allow trades to happen which don’t affect the main markets (lit markets). There is a specific purposed for these systems but they are being abused.
If you look at dark pool stats for last week (especially Friday), they are abusing the hell out of it.