I don't think so. I know many gates cominities that have a guard that verifies identity for those comming and going from the subdivision. And logs are kept.

If you can hire a human to do it and it is fine then I don't think any automated systems would be violating privacy.

Also there is no privacy in public places and you can probably conclude that you are in a public place before you enter. Eg. Their is no privacy at the checkpoint.