Now, I know exactly how Malfoy felt when he found out that Harry and Ron used Polyjuice potion to disguise as his friends trying find out whether he was the heir of Slytherins.
It’s not a pleasant feelings and certainly making you feel extremely stupid and uneducated.
TL;DR
Basically, Barty Crouch Jr used Polyjuice to disguise as Professor Moody and successfully lured me in. I bounced back with a little bit lesser faith in humanity when I started.
Triet Minh Huynh 