First of all, there is a strict process in proving that someone is a homosexual in Saudi Arabia. It’s not as simple as “here’s some pictures of this guy leaving a gay club, execute him”. If it were that easy the system would be rife for abuse obviously, especially in an age where any image can be faked or taken out of context. Second, you can simply deny the images were even real, or that it was not you, and further increase the burden of proof required.