Here is an article I found at the website: Yes, those purple streetlights are still around. Here's why

Hopefully this article will shut the attention seeking conspiracy nuts down...but it probably wont.

If streetlights in your area are affected by this issue, contact your local authorities to report the problem.

Contact the very authorities that installed the now defective lamps, stating they... don't produce light? produce harmful UV? hurt your eyes?
I don't know how things work over there but as long as the fixture produces light without any strobing or such, I don't think you're in a great position to complain.

Hopefully this article will shut the attention seeking conspiracy nuts down...but it probably wont.

To be fair, would anything? "You cannot reason a person out of a position he did not reason himself into in the first place"

I could imagine just one such fixture in an otherwise dark street causing a beautiful liminal look late at night, in the cool breeze, not another soul in sight...
Although I imagine this is something quite typical in less urban areas.

I would imagine there to be some UVA in the spectrum of the LED if theyre emitting bluish violet, but no where near enough to harm anyone.

Yes if they're truly in the light violet range like the images show, it might be a worry; but there's most likely a plastic/glass cover for the light and it's high enough that the intensity of it is zero or very close to zero.
I'm mildly surprised it's using light closer to 400nm than 450nm.

On my way back to college, I saw a Marriott property with 100% purple LEDs. Wonder what the guests think!