There are 2 aspects of your concern:
- Emotional
- Islamic
I can't address the first one.
On the second one as long as the laymen has selected a Mufti who is pious, Sunnah practising and obtained a ruling and acted on it then he/she has absolved his/her religion.
In our times there is Ikhtilaaf on Islamic mortgages on Shaykh (Mufti) Taqi Usmani (HA) and other Ulamah. I had a heated discussion with Shaykh (Mufti) Abu Hajira Saheb (HA) and in the end he had no choice but to admit two facts which we both agreed upon:
- Fact Number 1: Ulamah have the right to disagree with Shaykh (Mufti) Taqi Usmani (HA) and make their opinion clear to the public
- Fact Number 2: Laymen have the right to take whichever opinion they like and they will not be held responsible for it on the day of judgement.
Unless and until the Alim whom you are referring to is part of Ahlus-Sunnah Wal-Jamaat and trusted by other Ulamah you can't blame the laymen for acting on that advice.
As far as women travelling without Mehram is concerned it is the opinion of many many Deobandi Ulamah that it is permissable. It goes against the Madhab and it goes against Hadeeth (I know) but if a laymen acts on it then we can't blame them.
I WILL NOT name names of Ulamah who hold this opinion because it is upto them to make their names public but this opinion does exist.
You cannot expect the laymen to get in there to sort this out, its unreasonable.

