They said their friends work in “IT”. They have most definitely heard about adblockers and know how to use them, if this claim is legit. As a person who works in the tech field, I don’t know any coworkers who would not use adblockers. I find it kind of crazy to believe there are any IT professionals that don’t use adblockers, but I guess some must exist. Maybe they feel like adblocking is stealing or immoral somehow.