40 spam reports. Not one real call.

transcript

A tailor in Lucknow gets 40 spam reports. In one hour. Should his number turn red? The crowd writes this directory. So the crowd can attack it.

Look closer. Every account was created yesterday. Not one has a call from the tailor in its log. And they all landed in one burst. The burst itself is a signal.

Rule one. A report must point to a real call. No call in the log? It never counts. Rule two. Reporters earn weight. Account age, verification, past accuracy. Forty new accounts, no calls? They weigh almost nothing. The tailor stays clean.

Now number A. New this morning. 9,000 people called. 7,200 declined within two rings. 310 reported it. Red within the hour.

But here's the catch. A delivery rider gets declined too. People just don't know his number. That's not spam. So cap him at suspected spam. Let him verify and dispute.

Anyone can join the crowd. Scammers included. So weigh evidence. Don't count votes.

Full breakdown in the lecture.