I hope no one is laughing at you. If the are they have to answer to me
Our crown chakras should be fine -- But I am wondering why they would need protection when reading Sri Guru Granth Sahib. How could they be in danger? I have heard about protecting the crown chakra when doing spiritual activities. That comes from Sikhs and non Sikhs alike who are tuning into some Age of Aquarius message that has its roots in exactly the kind of mystification that Guru Nanak warned us against.
Some sects within Sikhi have made devotion 1000 times more complicated than originally intended, and often miss the point of the Shabad. That is THEIR choice.Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/questions-and-answers/32578-respect-to-gurbani-in-other-languages.html
I have already posted from the Sikh Rehat Maryada on the subject of covering your head. If you chose to show your respect by covering your head at other times and in other ways than mentioned in SRM--- then that is YOUR choice.
Their are wonderful pictures of Sikh soldiers during World War I carrying Sri Guru Granth Sahib Ji from one battlefield to another. They prayed and sang kirtan in filthy trenches, where they took hukam from Guru Granth Sahib ji, in spite of the dirt, vermin and obnoxious weather conditions. To me that is real bhagati.