There is a NHS colorectal surgeon who's posted on youtube regurgitated some bullshit about covid being a hoax, he's already been reported to the GMC which saved me the trouble of doing so, I did flag up the youtube video as dangerous content but its still up there so far.
A big part of it is that taking down these videos and deplatforming them feeds into conspiracy theorists more but I do believe that their views are dangerous and shouldn't be propagated
Fortunately I have challenged all my friends and family on social media and in real life with evidence of debunking to popular claims
Things like covid is a hoax, covid is manmade/lab generated, cures, 5G links have all been thoroughly debunked. I don't argue with people online too much but in real life I have found that those who share whatsapp messages or regurgitate them are amenable to being corrected on covid.
Being a doctor a lot of family members have approached me (sincerely) asking questions to things they've heard on whatsapp etc. Rather than dismissing them as gullible etc I do now take a more empathetic route to talk them through it.
I think critical thinking with regards to pseudoscience is a skill we have to somehow look into incorporating into society a lot more.