You always want to have a pen with you – it’s just common sense. Storing them in your shirt can be somewhat problematic, though, so it might be a good idea to put the pens inside a pocket protector. That way, if they suddenly reach critical mass and explode, you don’t have to worry about a shirt full of blue ink. The pocket protector will gladly absorb the damage, and all you have to deal with is getting repeatedly beaten up for your lunch money because you’re using a pocket protector.
The white plastic devices became a classic symbol of nerddom, and could be regularly seen on skinny computer programmers and the hopelessly unfashionable. They were ugly, inelegant, and the perfect accessory to go with taped-up glasses and cow-lick hair. Of course, the people who wore them now own major software companies and go on vacation every month to the Caribbean, so perhaps there’s something more to pocket protectors than has otherwise been considered.