"I am not anti-vax" is always the first lie we hear from every anti-vax idiot. Now that the general anti-vax position has been so thoroughly debunked everyone knows to avoid someone who is obviously displaying this particular mental illness, so they have learned to be much more circumspect about their claims and how to position their anti-vax arguments. It will usually start with a bit of sea lioning and concern trolling before they move into arguments that tend to end with 'just saying...'