I personally tend to look at cameras with positive interest and sometimes wave at the (potential) guy at the other end. Silly, I know, and no doubt you will call me an idiot or worse, but I know what I am and I am self-assured enough to feel comfortable about it, so what what do I care?
That would be "worse".
The three letter agencies are not your friends, and it doesn't matter what you know you are, what matters for them is to do their job, which includes investigating matches. Looking at numbers, the risk of becoming a false positive seems far higher than the chance of them picking the right person.
No matter how innocent you are, cops coming to fetch you at work or swatting your home with neighbors watching is not going to make your future bright, no matter how comfortable and carefree you are now.
And "worse" because what you do when deliberately offering your face to the cameras, is increasing the size of the haystack. And worse, smiling decreases the reliability of facial recognition, and increases the risk of false positives.
More hay to sift through, and more hay that can be mistaken for a needle. That's counterproductive.
Any cops who get your image popping up as a potential match are not going to be grateful to you for their extra work investigating and clearing you.
Given that you don't seem to be an idiot, as evidenced by clear writing, I call your actions "not even stupid".