Such security protocols are required for the safety of both the organization and the end user....
Pakwheels has both ios and android app.... that run's the same webcode written for it's website....
In case the security is compromised (Of your (mod) account or of system)it can become a great platform for spreading malwares... just like many other forums that have suffered from this.
As you (PakWheels) has already made the code for OTP verification then why dont you also make this option for forums? Now it is just copy paste with little modifications as it is already written...
But i will again say if you are doing it then it must be optional for normal members (a toggle button in preference to turn it on or off)....
Whereas for mods and systems or whichever account has superpowers (admin rights) this toggle button must always remain on....
Thanks for you time and attention