At internet scale, this would roughly be equivalent to not doing any warning or detection at all.

Scalable systems need to use heuristics to catch threats. Needing concrete evidence in every case means that an enormously higher amount of malicious resources will not be flagged.

There is a policy argument as to the right balance of concerns here. But there is a clear trade-off to make.

> Needing concrete evidence in every case means that an enormously higher amount of malicious resources will not be flagged.

Giving everyone a fair trial just doesn't scale. It costs too much.