I'm giving a presentation next week and I thought I'd carry on my laser pointer. Looks like a pen. Which stupidity should I count on, the one which goes 'ah, that's a pen, it's okay" or the one which goes "it's a weapon, it's a weapon!"

Is there a policy on laser pointers?

This one has some sentimental value as it was given to me by a group of people I worked with. Any chance of confiscation?