The actions mentioned above done by the family of a person intending to perform Hajj is a Bid`ah (innovation in religion). Setting aside a bed, washing it, covering and perfuming it and preventing people from sitting on it till the pilgrim returns from Hajj to be the first to sit on it, are acts of Bid`ah and instituting in religion that which Allah has not ordained. Allah (Exalted be He) says:
Or have they partners (with Allâh — false gods) who have instituted for them a religion which Allâh has not ordained?
(Part No. 2; Page No. 514) It is authentically reported that the Prophet (peace be upon him) said:
He who innovates something which is not in harmony with the principles of our religion, that thing is rejected.
Related by Al-Bukhari and Muslim.
The Prophet (peace be upon him) also said:
He who does any act for which there is no sanction from our behalf, that is to be rejected.
Accordingly, those who do what you have mentioned must stop as it is a Munkar (that which is unacceptable or disapproved of by Islamic law and Muslims of sound intellect) act and they should make tawbah (repentance to Allah) of all that they have done in the past.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.