We should stop lawyers from re-defining words like unlimited. We should make sure that if somebody says unlimited in advertisment or product description it really means unlimited. I know, I am an idealist. :)
I guarantee you that it was marketing, not legal, that came up with those definitions. After all, its marketing that gets the credit while the company sells throttled service as "unlimited," but its legal that takes the blame when the FTC fines the company $100 million for that practice.
That's possible; AT&T legal might have advised against advertising the service as "unlimited" but been overruled. I'd be really surprised if AT&T didn't have a policy where every advertisement goes through legal review.
Alternatively, Homer might have nodded in the AT&T legal department, especially if Homer was in fact a junior attorney.
Self-cite: A few years ago I pulled together a collection of marketing words and phrases to avoid or rephrase, culled from a large corpus of advertising reviews I did for a large company. [1]
The AT&T situation illustrates the truth of a rule of thumb mentioned in that collection: All categorical statements are bad — including this one.
[1] http://www.oncontracts.com/marketing-legal-review-some-words...