Where do all the pens go?

I reason that some of the 10 commandments might need revising - or at least have caveats added...

Thou shalt not kill - unless you have made your kids a meal - they are upstairs and they happen to be wearing their bloody headphones.

Thou shalt not steal... unless it is from a hotel and particularly a chain.

And even though I am frequently in such hotels for gigs and I regularly purloin any pens that I can get my hands on, this morning, dispatching copies of Eclipsed, I am reduced to addressing packages with a pink felt tip pen.