Can we define where the snakeoil starts? Even on these forums, with audio science, I feel like there's a huge amount of snake oil - for example:
Nothing snaky selling equipment which is measurably better than competition. The hissing starts when somebody is claiming without evidence that the better performance causes audible improvements in sound.
No point in making it difficult: just label everything that is claimed to something which cannot be measured or otherwise proven as snake oil, that covers most of the usual suspects.