So what's natural again?

From what I can tell, dreadlock wearers have different opinions about what it takes to have "natural" locks.  Here's the spectrum that I've seen:

• The neglect method:  just leave your hair to its own devices.
• Hands on:  it's okay to braid, backcomb, twist, and rip, but don't put any products in.
• Nature is as nature does:  use of completely natural products (locking agents made from non-iodized sea salt, for example) is okay.
• Nothing nasty:  commercial products are okay if they're not clearly toxic.

What's left that everybody can agree isn't natural?  The dread perm.