We have this guy at my current client who swore a lot when he started. Enough that it bugged other people which, considering the general blue tinge the air has on some parts of the floor, is reasonably impressive.
Now, there are a number of ways I've seen this issue dealt with in the past, but one of the guys on the floor came up with one which is new to me: a swear-o-meter. Simple enough; a semi-circle marked with levels of swearing and an arrow pinned to it. It gets set to zero at the start of the day, and cranked up as needed. Interesting thing is that it has been very effective: the offender has cut back to levels more normal for a New Zealand IT shop (that is to say, levels which would likely see one dismissed from companies in many parts of the world).
The bit I find interesting is the way this distills peer pressure into its purest form. Most other methods either involved non-peer pressure (complaining to managers and so forth), or create more workplace tension than they remove, such as “swear jars” - a remarkably dumb idea if I've ever encountered one, since the conflict between workmates is escalated by adding a money and b the implication that one set of peers has a set of powers (to fine) that they don't in a formal sense.
So, you know some plonker who believes that $1000/m speaker cable really does make a difference to the audio experience, and insists on regaling you with tales of rewiring his house with special power systems and such nonsense. Show them no mercy; show them cold, hard science. This probably won't make any difference, but if you're like me and have always been a bit skeptical about some of the more looney notions about in the wonderful world of “quality” audio systems, reading it will give you a giggle. And ward of any latent tendancies to drop a crapload of money on silly things you don't need (and I speak as someone who has spend more on stereo gear than most people would regard as sensible...).
Remember: if you can't hear the difference, it's not a sign you've got tin ears or a small dick. It most likely means someone is selling you overpriced crap.