While on the surface it appears that Numeric only .TEL domains names are awesome (we already see the larger numbers of numeric .COM sites) they can introduce yet another level of US centricity.
Now, it is possible to combat that if the country code will be a forced addition to the domain. Thus one could not register 1235551234.tel but can 1011235551234.tel (if they are in the states) or 71235551234.tel (if they are in Russia).
However, i recognise that this would increase the complexity of verification mechanisms. But that's what you've asked for in this proposal anyhow.
- Volodya -- http://freedom.libsyn.com/ Echo of Freedom, Radical Podcast "None of us are free until all of us are free." ~ Mihail Bakunin