I live in Australia - beaches everywhere. Trust me, you're
never going to use a PB on the beach, because:
- Sand and direct sunlight
- Beautiful girls in bikinis will point at you and laugh
- Somebody will feel compelled to roll you and steal your PB
- You can't go into the water, because the less violent thieves will just be biding their time to steal your PB
Kap
P.S. Also, trying to sit on the ground at all and use a laptop isn't the most comfortable thing in the world. Better to stick to using your PB seated in cafes with wireless hotspots.