In a couple of weeks I'm running a murder mystery adventure. They're live role-playing events and lots of fun. Everyone dresses up as their character, someone gets killed and we all race around trying to find the murderer.
I've run these before and what you want to do is send out the character pages to the participants a few weeks beforehand, so they can dress appropriately and think about their character. Normally what I do is split the PDF (they're invariably PDFs, sold online) into each character and email it to the person playing that character.
So far so easy. Except... this time we bought off a company called Freeform Games and it seems they use PDF password protection. Digital Rights Management. What this means is that I _can't_ split the PDF. They expect me to print the pages out and get them to people -- all over London.
I won't be buying off this company again!