This is from a book on Ijtihaad and Taqleed (Ijtihaad wa Taqleed ka aakhri faisla=Final Decision on Ijtihaad and Taqleed) by Ashraf Ali Thanvi. It is a compilation of his ifaadaat on this topic extracted from many of his works or works on him. Keep in mind that despite his shortcomings, thanvi was one of the most open minded among the hanafis of indo-pak. The scans mention three incidents regarding the aamin bil jahr practiced by ghair muqallideen. First two with the title "Aamin bil Jahr of Ghair Muqallideen": 1) In a jama'ah of muqallideen i.e hanafis, an Aeh said aamin bil jahr. A situation was created and it reached to police and the case was prolonged. Thanvi said that although fighting (on such issues) is zulm but through experince it has been observed that outcome depends on the intention. If the AeH would have said aamin aloud with ikhlaas and the intention of 'amal bis sunnah, such a fasaad would not have occured. Later a 'wise hindu' (thanvi actually said this) police officer blammed AeH for this fasaad and wrote a report against them. AeH protested against it and said that Aamin is said aloud also in makkah. Hindu officer said there it is for the remembrance of Allah, here it is for fasad. Thanvi's brother went to Qunooj and listened to the aamin of ghair muqallideen. He said aamin should be with khushu' but AeH's aamin looks to be a fight. 2) Shaikh Muhammad was leading a friday jama'ah. An AeH said aamin aloud. Again there was a situation. Some (hanafis) said get him (AeH) out and some said beat him. Muhammad silenced all and asked the aeh if the (hanafi) prayer without aamin bil jahr is valid or not. AeH replied that its valid. Muhammad said why did you worried a big crowd then. We also do not consider it is a matter to be reported (to police). The third incident is titled "Aamin bil Jahr wa bis Sirr wa bish Sharr !" 3) Such a case (on aamin bil jahr) was reported to an English (christian) officer. He investigated the case and in the end said that aamin is of three kinds. One of the aamins is aamin bil jahr. It is madhhab of one of the sects of islaam and there are ahadith that prove it. the other is aamin bis sirr it is also a madhhab proven by ahadith. the thrid is aamin bish sharr ! practised by the people these days (AeH).