Comment by throwaway2245

The principle of 'obscurity is not security' would seem to apply to anti-spam algorithms on the scale of Google.

I suspect that Google are not claiming this law would interfere with their anti-spam efforts, simply because it wouldn't - they can't justify it.

If that was a real concern, why wouldn't they mention it, for example in this lengthy blog post? It's a good public defence for them.

The fact that they don't say it, means that I infer the opposite.