There's absolutely no proof that thujone is hallucinogenic.
In fact, your average chemist would swear to you that it is not.
I've brewed a few beers with wormwood or wormwood oils in it, and drank much of each batch... never experiencing what I'd call a "hallucination" under their effect.
Absinthe will, however, get you fucked up... but no more than a decent bottle of gin might.
Like Gin, Absinthe contains many botanicals - some of which may give a stimulant effect, giving you a more clear-headed buzz. Thujone does seem to have this effect, even if it won't take you down the rabbit hole.