It is totally their rights to ask and investigate that you are applying according to the rules and terms clearly mentioned or you are trying to fool them .
We understand that people lose money tickets and such things
A lot of scammers , call center scammers , Cypercrimes, Come to Thailand with visa exemption and even with TR and overstay , use a friend name to get Sim card or whatever and start that huge illegal activities earning millions with illegal ways.