Actually DUA is a personal matter between Allah and HIS creation of humanity. Hence don't make Dua behind Masajid Imams after Namaz. The Tablighi Jamaath at the end of their session make long DUA as if Allah accepts their DUAs. Our Desi Muslims due to lack of Quranic knowledge follow Mullas instead of Quran.
...Allah has made the religion of Islam clear and easy to follow (5:15/ 6:105/ 19:97/ 27:1-2/ 54:17,32,40). But our Mullas have made it as hard as possible to impose their priesthood domination on us.
....Allah says there is no compulsion or force at all in religious matters and rituals (2:256/ 18:1/ 22:78) as wrongly and deliberately being projected on the basis of fabricated Hadiths etc. by our Mulla to divide and rule us.
....Allah directs us to follow only those who are righteous as per Quran and do not seek reward/money/wages (12:104/ 36:21) being a voluntary Fi Sabil Illah work to achieve Allah's Blessings.