" The tantric beginner is advised to eat, drink, and have sexual relations according to the customs of his own country until he attains the mantra-siddhi or the gnosis-siddhi and thereby becomes a tantric yog. The Kalacakra tradition offers several reasons why the tantric beginner should not transgress the customs of his country and social group for as long as he lacks the above-mentioned siddhis. First, if the tantric beginner, who has not attained those siddhis, eats the flesh of an animal that is a tutelary deity of his family and thereby offends that deity and causes it to bring misfortune to his family, he will be unable to protect his family from calamity. Similarly, if the tantric beginner violates the customs of his country by eating the flesh of animals that are the tutelary deities of other families, and by having sexual relations with prohibited castes and outcasts, the people he offends will harass him, since he lacks the siddhis and realizations of a yogi. However, once a tantric adept attains the mantra'siddhi or the gnosis-siddhi (jruma-siddhi), he is allowed to eat and drink and have sexual relations not just according to the customs of his country and social class but just as he pleases, because he has transcended the distinction between the allowed and prohibited, the suitable and unsuitable, and no one is able to object or harass him .
from "The Inner_Kalacakratantra A Buddhist Tantric View of the Individual"
How should I understand this quote?
once a tantric adept attains the mantra'siddhi or the gnosis-siddhi (jruma-siddhi), he is allowed to eat and drink and have sexual relations not just according to the customs of his country and social class but just as he pleases, because.. no one is able to object or harass him
Why nobody is "able" to object or harass him? Because he is capable to display in public such siddhis, and everybody will understand that it is a real tantric adept? Is tantrism really so pragmatic?

