We've Tweeted, Now We Can Chirp

Hmm, sort of like bluetooth, but with a chirp to let the nearby world you're exchanging data?

I think that's right.

I just can't get over how noisy a rail carriage might become, either.

I am currently developing an app called "fart". It will show what others had for lunch by the noise of their flatulences.
You will then be able to connect to other people with similar eating habits.

It can also work over public address systems or radio transmissions - potentially allowing broadcasters a way to send up-to-date pictures or links to background information; or an advertiser to send coupons or snippets of a song or promotional video.

Animal Systems subscribes to a "blacklist" service to prevent users transmitting known pron or illegal-content website links. However, it does not plan to moderate other material.

Wow...is this just a technical exercise, or is this for real? Because surely they can't be this naive?

If this goes mainstream, this will get abused in minutes.

Example off the top of my head - a football match between two teams with a 'history'. The police are making sure the supporters do not clash. One guy gets up with a megaphone, sends out a chirp with a picture saying 'Your team sucks'.

Yeah, unless I'm missing something, this is a really dumb idea. Clever, yes, but dumb in application.