This gets the thread on a more constructive track.
I've had two personal experiences with this dynamic and law enforcement officials. One was direct and the other was indirect. I was talking with a parole officer who worked in north Louisiana in a parish or municipality where this was a law.
We were talking about harassing youth one day and he brought up this law and said that it was implemented to stop young black males (his words) who might have gang affiliations but couldn't be pinned for anything else or stopped for any other reason. Looking at the numbers, there was definitely a racial imbalance.
But it wasn't out of line with the other statistical analyses about general population demographics vs. incarcerated demographics and the disparities along racial boundaries.
So it's hard to say whether or not this was specifically a form of harassment, different from other means, or simply another tool used to perpetuate that disproportionality.
The second example was with a group I had worked a bit with in the NY area on youth profiling vis a vis criminality. This team's experience was much more widespread and documented in terms of who was pulled over and when for this reason. The racial disparities once again were evident, but on a greater scale.
It wouldn't be the first time laws were put in place for reasons of harassing kids of color or marginalized kids from other demographics (e.g. goth, homeless) so I think the presence/role of racism is a valid issue within the broader context.
But that doesn't mean the law itself is necessarily racist. It cannot be ruled out and there are other precedents that have had similar impacts, so the question is reasonably begged.