Doesn't this use case eventually screw over any future Twilio customer that selects that number? I see several inbound calls to my Twilio number from random numbers that I have to pay for, even though I'm only using Twilio in a development capacity right now. Do you guys "expire" numbers from your pool that receive aggressive amounts of Inbound traffic (voice, fax, or SMS)?

At some point a few years back, my VW dealership sold my phone number to people for vehicle service contracts. Even though I sold that car 4 years ago, I STILL get at least 2-3 calls per week from different companies offering to sell me an extended warranty. How does Twilio mitigate that for us?

(Off topic, but seriously, thanks for Twilio. Ping me if you want to know how we're using it in our new startup [email in profile]. It's pretty rad.)