Unlimited means no restrictions
That is at least the definition by us common folks who are happy to get an unlimited plan - be it Internet or mobile phone - only to find out that the fine prints are detailing lots of exclusions that turn the advertised unlimited plan into a limited one. I'm not a marketing expert nor a lawyer but this does look fishy to me.
Why are companies allowed to advertise unlimited plans if those are in fact limited? I could recount dozens of stories on the Internet where someone got kicked because they had been using 'an excessive amount of traffic'. I mean, if they say unlimited it should mean that you could download 24/7 with full speed without facing consequences, that's what the word unlimited means in my opinion.
So, my question would be if it would be possible to sue those companies who advertise unlimited plans but kick you as soon as your traffic exceeds their figure X. From my point of view this is misdirection. Consumers think that unlimited means unmetered, but what do lawyers say about this?
The same issue exists for other popular marketing words such as flatrate. Flatrate in the beginning meant just that, that you could use a service for as long and as much as you want without having to pay extra. Today, almost everything seems to be advertised as a flatrate, even though it often means that you get a limited connection, limited bandwidth, or will notice speed drops once you cross an artificial limit the provider has set.