Yeah no. No one has hair so big you can't see a board. If someone wants to wear their hair naturally they should be able to. Dreadlocks certainly wouldn't prevent it either. Frankly it's a bunch of tosh.
2a medium porous, You can see my wavy tutorials here: https://www.youtube.com/playlist?lis...ZNxhBHSXAW40OQ and my wavy blog is The Wavy Nation http://wavynation.wordpress.com