You know what would be a great feature on an iPhone?
The ability to turn off Silence Unknown Callers for a specific time period.
I turn it off all the time for callbacks, deliveries, and other random phone calls that I know are going to be happening in the next few hours. You have to turn off the firewall sometimes.
And then I forget to turn it back on and get a stupid telemarketer the next day.
Pretty sure this little computer could remember to do it for me.