ok, ive looked through several threads about the prehensile hair hex and i havent seen concrete answers to these questions:
1. How does the hair interact with AoO: if i trip/disarm/grapple at range without the greater feats, thus provoking an op attack, do they get to hit against my AC and deal damage since the hair cannot be attacked separate from the witch?
2. On a successful disarm attempt do i get to use the hair for the automatic weapon pick up or is it just totally incapable of interacting with weapons?
3. if i pick up something higher than my encumbrance but within the encumbrance level of the hair and walk around what happens?
4. if i pick up something higher than my encumbrance but within the encumbrance level of the hair and try to fly what happens?
Just like other forms of reach, enemies can't take AoO unless they threaten your square.
Strict RAW is, your hair is hoplophobic and won't touch weapons. Non-retarded interpretation is that your hair can't wield or reload weapons, but is fine to pick them up.
Encumbrance-wise, I would use your own str score, but allow the hair to shift heavier items if you're stationary and braced.