The person you are responding to spoke assertively and quoted Google websites, but I don't think they work or worked for Google.

We have no evidence either way. And referring to someone who's weirdly in favor of a multi billion dollar corporate opposed to the rights of individuals at least an agent of that group seems appropriate verbage

Thanks. I will rephrase my comment.

> it would be irresponsible to do that on private data.

If they do it on searches not meant for publication then are they irresponsible?

People want spam filtering, so of course they will read your emails.