Enable private pads.
Some of my friends are rather mischievous and like to be on my etherpad when I'm on, erasing as I type. It's really annoying. Also, sometimes there are random strangers stumbling into my etherpad.
If I enable free pro-accounts this problem must be solved. Cheers.
you can put a password on the specific pad. I'm not sure exactly how it works, though.
Just don't start indexing recently edited pads like Piratepad did and all pads will be secure by obscurity.
All pads are private - people won't be able to get on it unless they can get the link to it. Don't give them the link, and you won't have a problem.