Mob Peeve

That's the estimated total number of mobile phones currently used around the world.  It's also estimated that another  1 billion phone will be sold worldwide in 2009.  This means that these "mobile-polar" behaviors aren't going to stop anytime soon.  So take some action and speak up!  At least arm yourself with these apps to retaliate against unruly mobile users.
Source: WolframAlpha, Gartner Group

MobPeeve "Notes" - download -
These are cards you can leave for those pesky mobile users.
Download it.  Cut it.  And place them where ever you want or need them.

Here's a few applications that we recommend for combating annoying behavior
All applications featured here are available for free from the iTunes Store.

 Annoyance! - by Ethan Production - This app may be the most realistic to use.  Sounds featured include:  Baby crying, nail on blackboard, chainsaw, jackhammer.

Sound Granade - by High Gloss - "give you instant crowd control"  It generates a really, really annoying, nauseating and headache producing high pitched sound.  So what are you waiting for?  Give the irritation right back!

  Annoying - by Craneballs Studio - Burping, laughing, farting…

Absentee Toolkit - by Get Odd - Coughing, sneezing and blowing your nose if you just want to gross them out.

If you feel really creative, or you just have a lot of anger or time, you can also make your own sounds. On garageband or other programs.

Here's also a link to "How to Make Custom IPhone Ringtones Without Paying Apple $2"

MyTinyPhone
(http://www.mytinyphone.com/) Quickly find and download ringtones and phone wallpapers shared by other members to your phone. All the downloads are 100% free. No hidden fees! No subscription!  Or easily upload and make your own ringtones, videos, phone wallpapers and send them to your cell phone or share with other members.