The point shouldn't be to identify for sure 100% what is ai art and what isn't. I keep seeing posts advising one to look out for wonky perspective (as if perspective doesn't routinely trip up even the most experienced artists) or to pay attention to fudged detailing (as if impressionism wasn't one of the most influential artistic movements in history), and I think that's coming from a good place but frankly it's a losing battle. Remember when everyone was on about counting the fingers or counting the teeth, and a week later they had that shit ironed out completely? All you're really doing is giving these people more data points to work with to refine their algorithm. It's just going to be constantly shifting goalposts, and at a certain point real artists are going to get exhausted trying to make their art look as not algorithmically generated as possible. It'll be impossible to keep up.
So what should we do? Honestly, I think old practices are still best practices. Find real artists and follow them. Don't repost art, and dont spread reposted art. If something doesn't have a source, skip it. Support artists you like, either by sharing their work directly or donating. And if someone's work looks suspicious? Maybe give them a second look. See some of their other art before jumping to conclusions.
And yes, that means sometimes, you're gonna be tricked. Some people are going to fly under the radar and pass off ai art as their own. And that sucks, and they're liars, but you can't let the obsession with bad actors police real artists out of their communities, or discourage new artists from entering the scene.