Perhaps it is time to codify the following:
The more professional the pic, the greater the risk.
Has a nice ring to it, doesn't it?
As I've mentioned before, it's all about context. Given the clues you can infer from her profile, do the pics align with her story/situation? Some examples:
1. A 20 year old college student studying nursing who works part time in retail is not likely to have several glamour shots of her on a yacht, in front of the Paris Ritz Hotel, or sunning herself on a rock in Tahiti. Those are likely to be stolen IG or model pics.
2. A a 24 year old exchange student from Brazil studying fashion design in NY who says she models on the side should certainly post at least one professional pic of her.
3. If she says she's a porn star or professionally published model, you should expect that at least one of her pics will get a reverse image search hit (which will reveal her professional name).
4. If she's riding in the back of an Acura with a vape pen and making duck lips for her snapchat homies, she's probably from the 'hood and looking for a way to get fast cash (or I suppose a way out of poverty).
So consider each pic for it's context and compare that to her apparent situation; do these pics make sense?
Nothing wrong with any of these situations. But try to use that memorable song from Sesame Street:
"One of these things is not like the other,
One of these things just doesn't belong.
Can you guess which is not like the others,
By the time I finish my song? "
And finally, if SHE knows that song, she's likely to be WAY older than her stated age in her profile. :p
Life is good
The Cat