I'd say people not being able to say "Those vaccines were rushed and possibly not tested properly, and big pharma is known to care about their profits and not about people" is indeed harmful for the skeptics.
But not "Those vaccines are planned depopulation, they'll kill you all, give you AIDS and cancer and turn you into a zombie" - I'd say voices like those are actually more harmful to skeptics because, let's admit it, it sounds absolutely retarded and it's easy to build a narration in which every skeptic holds such views.