Paranoia and freedom to share contacts

I think that the tradition of “not giving contacts to one’s acquaintance without his prior consent” is a dead-end branch of evolution.

Even in spite of the fact that it is “the age-old tradition of business etiquette”.

Judge for yourself, you are approached by a friend or friend with a request to give a contact to a business partner or someone else who can help him.
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Etiquette obliges you to first ask "can I give this guy your contacts?", Wait for an answer and, if it is positive, pass the contact.

It is very, too, and catastrophically long.

Personally, I prefer to turn off paranoia and warn everyone that my mobile phone number and email address are public information.

They can be given to anyone who requests them.

I myself will figure out with whom I continue the dialogue, and with whom - no.
Dialogue does not need to "filter on input."