I go back and forth on that. Dandelions are invasive in the US, yes. And they're green plants that feed pollinators, and they outcompete grass in lawns which not much else can do, and if they're already populating lawns throughout your area you're not doing much damage by planting a few more.

I wouldn't randomly plant dandelions anyplace where native plants could grow without harassment. Nor would I plant dandelions in a part of the US where they don't already grow. But if you want to send a message and fuck up somebody's lawn or golf course they'll do the job.