Interesting, was not aware of this:

Often Hadiths were forged long after Muhammeds death by people who knew that having a document of the Prophet doing something which supported their point of view could be very advantageous

That does make quite a bit of sense, especially in the broader context of Islam (multiple splits and schisms based on who said what/who was related to the prophet). My source on this was just lazy googling, will edit comment accordingly