Faux tattler resolution
Seems that this problem is more wide spread than I thought. I don't know what everyone else does to resolve it, but here is what I have implemented. It's a little something I call "That didn't work out so well for you, did it?"
It's a simple plan. The faux tattler is given the benefit of the doubt. Perhaps - in a very small percentage of the cases - they are in fact, trying to be helpful. In that case, nothing is said.
But in an obvious case of faux tattling, the offender usually gets to take care of the thing that was so offensive to them. An example would be a case of someone faux tattling that so and so didn't put their shoes away, then they get the honor of doing that for them. Serving their sibling - they love that.
If it's just something that can't be done - such as "You know you aren't supposed to drink that juice." then the faux tattler gets to go to time out with their nose in the corner . This prevents them from seeing what's going on and becoming so despaired at what is happening that they can't help but blurt out helpful tattling. They get to stare at that corner for a good long while and consider their future actions. At some point I usually get to say, "That didn't work out so well for you, did it?"
It's simple, but in the past few days, I must say there's been a lot less tattling and a lot more helpfulness. Works for me.