Actually grave worship is prohibited in Islam.
It is strictly frowned upon and is a Sufi innovation onto Islam.
It is haram but Sufis here will attack me now.
My only reason to ask such thing is that everyone has there believe system, if one feel happy with such rituals than it should not concern me as long as it dosent harms me or the society as a whole. We should respect all belief system and all muslims in India and also from Pakistan visit Ajmer sarif and Nizamudin dargha in India.