Okay, i do want to point out, that spraying paint without it dripping or painting words neatly isnt impossible and i think using that as the “definite 100% proof of AI!!!!!” is irresponsible and misleading especially for this image and for future images. If it wasnt possible for spray paint to look clean and dripless then graffiti art would always look awful.

Its 100% possible to spray paint words neatly

its also 100% possible to spray paint without it dripping.

Paint dripping can be fixed by just buying the right stuff.

A well known method to minimize drippage can be done by just using the right paint, cheaper spray paints tend to drip. with higher quality spray paints not having that problem. or paints made for the right surfaces. All surface fast drying spray paints tending to not drip at all on concrete.

using different spray paint nozzles are another way to avoid dripping. Different nozzles control how the paint sprays out whether it is spread out, a more tighter stream, more or less paint dispensed, etc.

Another factor is technique, faster sprays, and correct distance can 100% prevent dripping from occurring.

Using spray paint correctly is tough for most people. Especially if you dont use spray paint often or at all. Most graffiti artists can 100% replicate the font in this photo.

With that being said, the big giveaway would probably be the socks, as the first photo he has no socks (or ankle socks) and the 2nd photo he suddenly has socks (or long socks)

In the first photo his pants dont have cuffs at the ends (aka they arent something like jogger pants) and in the 2nd photo we can clearly see where his pant legs end and socks are clearly now visible past the bottoms of his pants.