If they are mentioning things like a difference between men and women praying, then presenting them with their own scholars (Salih al-Fawzaan) who believe in that will be effective, or going down into sujood knees first (ibn Uthaymeen), or the rest. Many Salafis are really just Shawkanite-style people who would be shocked to know of the positions they deride being espoused by scholars whom they consider to be reference points. For example, in al-Fawzaan's al-Mulakhlas al-Fiqhi, it espouses the position of hands under the navel as one of the Sunnah positions.