可以使用十六进制编辑器从exe文件中删除代码？ （C ++）

so I was wondering if I could simply use some identification passages in my application to identify the origin of a copyright infringement (not yet implemented, just a thought). But then I figured, probably it's possible to simply cut the respective passages in my code or edit them to make identification impossible with the help of a hex editor or thelike. Is this possible? Let's assume for example I would put a hidden comment into the code which could be accessed in a certain secret way (e.g. by clicking somewhere). Now if someone possessed two program units (i.e. which were sold to two different people) would he be able to delete/edit the ''difference'' in a hex editor?so I was wondering if I could simply use some i