A "very close and supportive family" had kicked him out so he was living in a car. That whiffs a bit IMHO.
As regards Tinder validating age, it's not workable while anonymity is allowed (even recommended, as on Answerbank) in cyberspace.
As regards the sentencing, it is certainly lenient. [A slight digression coming up here] Just as young girls are warned of the danger of going out alone late at night, I think young men should be similarly warned of the danger of taking age as stated from girls. Or, in both cases (admittedly different), face the (once again totally different) consequences. This redresses the balance somewhat between the restrictions on the freedom of the sexes. I haven't put that very well, but I do feel men have it easy compared to women. In a perfect society of course neither danger would exist.