I tend to agree with the hard line taken by the head teacher however I don't think it would warrant sending children home with the possibility that their parents will be sent a text. You could be sending home children as young as 11 who may not normally have to make their own way home. Surely...
Are you saying you wouldn't trust a doctor with 'any' tatoo or piercings? Why ever not? I don't have any myself but wouldn't judge their capability on the fact they do!
Perhaps you should define 'inappropriate'. As for introducing hygiene, not sure that has anything to do with this debate...