1) Visiting the graves: It has become a habit to visit the graves on the days of 'Eed, and there is no evidence to support this during this period.
2) Free mixing: The free mixing of men and women at the graves. He (sal-Allaahu 'alayhe wa sallam) said:
((I have not left behind me a fitnah (trial) more harmful for the men than the (fitnah of the) women.)),
[The authenticity of this narration has been agreed upon by al-Bukhaaree and Muslim]
3) Recitation of the Qur.aan: It is prohibited to recite the Qur.aan at the graves. He (sal-Allaahu 'alayhe wa sallam) said:
((Do not render your homes as graveyards. Certainly, the house within which Soorah al-Bakarah is recited is protected from the (evil of) Shaytaan)),[Transmitted by Muslim]
And the Messenger (sal-Allaahu 'alayhe wa sallam) taught his companions to recite the following upon entering the graveyard:
((Peace be upon you all, O inhabitants of the graves, amongst the believers and the Muslims. Verily we will, Allaah willing, be united with you, may Allaah have mercy upon those already called and those still delayed among us all. We ask Allaah for well-being for us and you (from the punishment))),[Transmitted by Muslim]