Sorry to bump an old thread but had this mentioned for the first time EVER in our hall last night with no scriptural explanation whatsoever.
The elder was doing the bible highlights and discussed the nazirites who grew their hair long to show subjection to jehovah. He read the scripture where it pointed this out and then without pointing to any other scripture said and I quote: "Notice it says nothing about not taking a blade to their faces!!! That's why we don't have beards!!!"
The faces in the hall were a picture of 'did he really just say that?!
I scoffed quite audiably as it was so ridiculous.