[wcoenen]

You can't determine what the majority of the nodes thinks in this way because of Sybil attacks. Otherwise we wouldn't need proof of work as a consensus mechanism.

Mycelium's "transaction confidence" feature is well intentioned but it is a disaster waiting to happen.

[buss]

I agree with you, but I don't think it would be worth the effort to conduct this attack for such low value transactions. I'm certainly not an expert here, and clearly the blockchain is the only source of truth in the end.

[hendzen]

Agreed, this is a very fragile heuristic. The blockchain exists for a reason folks.