As statedby stiffmeister, I doubt this will be erected anytime soon, though I do actually condone it. While my loricariidae love affair has been fun, where I to choose between the potential extinction of various plecos or their total ban from the aquarium hobby, I would choose the latter.
For the record, the "common" pterygoplichthyinids and hypostominids are in fact the most potentially invasive species, so I don't really understand their widespread allowance as opposed to other, smaller and less prolific species.