While I regularly point out the falsehood of claims such as Steve Kirsch made in his blog, I have never, to date, urged or advised even a single person to be vaccinated - not online, not outside of the Internet. I do know of one person that I stated should not receive a Covid vaccine, or any other vaccine, because he, apparently, is allergic to one of the non-active ingredients commonly used in vaccines.
BTW, one of the screening questions one answers in setting up an appointment for receiving a Covid, Shingrix, or flu vaccine is whether the applicant has had allergic reactions to vaccinations or other injected medicines. So there are people "out there" who cannot receive a Covid vaccine (until an oral vaccine, e.g. Vaxart's, is authorized; FWIW, Vaxart is currently in Phase 2 testing and I'd guesstimate it's at least a year from applying for EUA).