Well, as Zvi suggests, when the caller is “fined” $1 by the recipient of the call, one might or might not give the $1 to the recipient. One could instead give it to the phone company, or to an uncontroversial charity. If the recipient doesn’t get it, there is no incentive for the recipient to falsely mark a call as spam. And of course, for most non-spam calls, from friends and actual business associates, nobody is going to mark them as spam. (I suppose they might do so accidentally, which could be embarassing, but a good UI would make this unlikely.)
And of course one would use the same scheme for SMS.
Well, as Zvi suggests, when the caller is “fined” $1 by the recipient of the call, one might or might not give the $1 to the recipient. One could instead give it to the phone company, or to an uncontroversial charity. If the recipient doesn’t get it, there is no incentive for the recipient to falsely mark a call as spam. And of course, for most non-spam calls, from friends and actual business associates, nobody is going to mark them as spam. (I suppose they might do so accidentally, which could be embarassing, but a good UI would make this unlikely.)
And of course one would use the same scheme for SMS.