Shoghi Effendi : Gradually and Tactfully convert the people.

...the upper classes ... need the right type of people to approach them, and a method that can suit their mentality. Our teaching methods should allow a certain degree of elasticity in establishing contacts with various types of individual seekers. Every inquirer has to be approached from his own angle. Those who are essentially of the mystic type should first be given those teachings of the Cause which emphasize the nature and value of spiritual realities; while those who are practically minded and of a positive type are naturally more ready and inclined to accept the social aspect of the Teachings. But of course, gradually the entire Message, in all its aspects and with the full implications it entails, should be explained to the newcomer. For to be a believer means to accept the Cause in its wholeness, and not to adhere to some of its teachings.

However, as already stated, this ought to be done gradually and tactfully. For conversion is after all a slow process.

(From a letter dated 28 December 1936 written on behalf of Shoghi Effendi to an individual believer)

The UHJ in one of its message says:

The cornerstone of the foundation of all Bahá'í activity is teaching the Cause.

(The Universal House of Justice, Baha'i World Centre, March 3, 1977)

From the beginning of their history, Baha'is have been converting people "Tactfully" (or deceptively?). Here are some pictures from Pakistan and Bangladesh

They have been targeting Hindu Minority in both these countries. In Pakistan you can see Baha'i pictures in Hindu Temple!! they have been targeting vulnerable people in these countries. In India most Baha'is are poor Hindus, In Malaysia also they have been converting mostly Chinese and Tamils.