Is it valid to rub against the walls of the Prophetic Chamber and for the worshipper to stand facing the grave?

The article warns against certain religious violations committed by some visitors when visiting the Prophet's Mosque (may Allah's peace and blessings be upon him), including: supplicating to the Prophet or seeking his aid, standing before the grave in the posture of one praying, bowing or prostrating at the grave, supplicating to Allah at the grave with the belief that supplications there are more readily answered, sending greetings to the Prophet through visitors, excessive visits to his noble grave, and facing his grave from all parts of the mosque. The author cites prophetic traditions and narrations from the Salaf (early Muslims) to underscore these warnings.