As others have pointed out, change opt-out to opt-in. Don't send a single byte until opt-in is complete. Change your frame of mind from "my software" to "your

As others have pointed out, change opt-out to opt-in. Don't send a single byte until opt-in is complete. Change your frame of mind from "my software" to "your computer". If your users don't explicitly opt in, you have no right to take what they do not freely offer.