If you want to buy BTC using PayPal, just use one of these sites:
- localbitcoins.com
- virwox.com
- paxful.com
And of course, you're expected to submit identification details.
I have a personal Facebook with lots of friends. I have videos and pictures of me at my local martial arts gym, and my whole family on my Facebook. (Grandma, mom, sister, girlfriend, etc) Would this make a seller more comfortable dealing with me?
I really don't think this matters much, unless the person you're transacting with knows you personally.