What do any of you suppose the liklihood of a restaurant worker passing HIV onto a customer is? Especially someone taking current drugs that make the virus literally undetectable?
The only way I see it happening is if the worker were to be somehow cut, then bleed into some food that is later eaten by a customer. And even in that case, infection is certainly not guaranteed.
I don't pretend to have facts or figures here, but my guess is that you'd have an equal chance of being hit by a bus on your way home.