Best air filters for cars and bikes are the BMC or K and N or similar washable filters, as far as I know.
Your research is correct all that will happen is damage to the MAF and potentially to the turbo.I guess I need to update my research. When I had my TDI, there were lots of examples of MAFs being ruined... especially the VW/Audi ones that use a film which can't be cleaned properly vs the old style wires that CAN be cleaned.
Almost rightFindAlex mate I totally dissagree with you, these washable filters are the best cos they trap more particles and let more air through. I have used them for many many years and they are GREAT.