However, if Thiomersal contributesto autism, then anyone who's gotten a tattoo in the past 50 years should have developed autism or autistic behaviours.

There's at least one or two magnitudes more Thiomersal in tattoo-inks (per 100 grams) than in any vaccine, ever, so if Thiomersal has a connection to autism, then tattoo-artists given their exposure should all be autistic.

I think it's high time to drop the Thiomersal-trail, especially since it's rarely if ever used in vaccines anymore (from the mid-1990s here), or to come up ith actual proof of the process.