Well that's what was asked, the moral panics of the left, of course they are fringe. Almost all moral panics are fringe, thank goodness. Equating D&D with satan was also fringe. I had exactly 1 friend who's parents wouldn't let him play D&D because his mom thought it was satanist, or close to it. They weren't an overly religious family either, she just got sucked into the fear mongering propaganda.
I'd like to know which examples you don't believe exist.
Do you believe the moral panics I listed don't exist? It might be because of your biases. If you support left culture, you might be blind to them. I've switched sides so many times, I'm more aware of all the BS of both tribes.
This is so far down my comment chain I might not see your reply. Here's a link to the NYT article where 48% of Democrats believed if you catch COVID, you have a 50%+ hospitalization rate (actual is 1-5%). 28% of Republicans and 35% of independents believe the same thing. If that many people believed this was true, the result would be exactly what we saw, ostracization of not only people who don't want to get vaccinated but people who dared want to talk about the costs and benefits of vaccination. If that's not a moral panic, I don't know what is. You can google the others at your leisure, or not.
Paywalled, so I can't actually see that, but if anything the fact that I know my personal bubble leans very left and yet I have never met a single person whose beliefs are that extreme that makes me doubt those numbers.
Even the most Covid overreacting people I know aren't anywhere near believing it's a 50% hospitalization rate: they get tested constantly and are aware of multiple cases of Covid among their circle with no hospitalizations. Paranoia about after-effects comes up much more.
You'll have to elaborate, I'm not really understanding what you are saying.