“Unlimited” data tariffs: What’s a true fair use limit?

Unlimited mobile data

I’m with Orange for my mobile contract, and data hiccups notwithstanding, quite satisfied. When I signed up, however, I asked for their “unlimited” data tariff, which (at the time) I was told had a 500MB “fair use” limit. 500MB? Really? If 500MB is fair use, then what’s standard usage? Do Orange expect people to use less than a couple hundred MB per month? I asked them what they could do to increase the limit, and was told I could bolt on another 500MB for an extra tenner, but I (rightly) guessed that probably wouldn’t be enough either.
As it turns out, they’re able to bolt on one of the low-end datastick tariffs, which turns out as £9 for 10GB per month. Since then, I’ve been merrily downloading and munching on data without any fear of incurring extra fees.
I don’t believe that I’m a particularly heavy user – I listen to podcasts, a little bit of internet radio, use twitter a lot, a bit of web, a bit of facebook, various web apps, and a little video too. Yet, I consistently go over 1GB per month, and sometimes 2GB. If I’m using this, there must be a considerable number of people using significantly more.
What sort of data volumes do you reach per month? And what do you think would be a true “fair use” limit?

Mountain Bike Erosion and Trail Use Study

My dissertation from my degree at Nottingham Trent University, studying the erosional effects of mountain biking, walking, and horse riding on different trails. The study also looked at the social interactions between the different groups of people using the park.

The social and environmental effects of mountain biking at bestwood park in nottinghamshire

If you would like to reference this study, please let me know by commenting below, or send me an email at tom.geraghty@yahoo.co.uk. If you would like any further details, or access to raw data, also get in touch and I’ll see what I can do.