It was bound to happen sooner or later. Infact, I thought it had already happened last year.
As much as people blame RSS in this, I personally think this has much more to do with BSP. By creating a separate religion for Chamars and Dalits, Mayawati has a new market in other states.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/interfaith-dialogues/29096-ravidass-followers-declare-separate-panth-granth.html
I don't blame them either. There is a huge population of dalits that could be interested in this. Ambedkar has some effect by converting hindus to buddhists however it was not that great.
Anyways, good luck to them.