I done that reverse image search for myself. Didn't give any indication as to who I was. Same as for some WG's that had issues with. Copied and pasted their photo, done a reverse image search, and again no indication as to who they were. The only results on their photos referred to perhaps their hairstyle, clothes, jewelry, whatever?
If it was that easy to identify people on a reverse image search, how come almost every week in my local paper is face pics wanted by police. If police can't do it, how can anyone else?
Like I said it won't be easy to trace everyone, it depends how many pics there are of you on the web, the quality of the pic, etc. I remember one the results it found of me was when I attended a book launch for a friend & she'd put some pics up of the event, one of which had a caption with full names. If you don't have friends who do things like that, or put up regular pics of nights out on social media etc, you don't appear in many work related pics, then I guess there's less likelihood of it finding you.
It's possible Google have made RIS work less well for face pics too out of privacy concerns, as said it was about 10 years back when I last used it.
As for the police, I guess some of the folk they look for are good at keeping a low profile. If Google have made face searching more difficult, I'd expect they don't let the police use the enhanced version except in very serious cases. (That's the way it used to be, & probably still is, with mobile phone companies for example. They'd refuse to release even basic geo-traces & call history except in special cases.) Spooks on the other hand are allowed full access.
Anyhow, you don't think it's easy to trace from a pic, I think it's very unlikely most WG's with security cameras would even try to. Either way no big reason to worry.
