The WT spin on "tattling" is that you are showing your LOVE for your brother by helping to correct whatever the problem is. And there are guidelines: 1st you are to go to your brother and tell them your concern; if that doesn't fix the problem, you bring another "mature" one with you to assist in correcting them; then if that one still doesn't address the issue, you go to the elders.
So guys, you see it's not really tattling at all . . . it's love