[mootothemax]

Any decent SMS gateway should let you send messages from who the hell you want. Add far as analogies go, it works pretty much the range as email, and would take the same fundamental redesign to fix.

[jonknee]

Email at least has SPF records and DKIM.

[kevinburke]

At least in the US it's against the law to spoof a 'From' SMS address you don't have access to.