I don't think we need to worry. The process for a plant to absorb these long hydrocarbon molecules would be rather complex. Thinking out loud (as a not very good Physicist, not a Chemist), the only conceivable place I could picture anything would be on the surface, and this would be as an even distribution through the growing medium. It would be removed by scrubbing if one was worried.
I know there can be risks from heavy metal contaminants and the like, but obviously these are much simpler molecules, the absorption of which is much easier (for me) to visualise. Oh, and they wouldn't generally be used in the manufacture of food containers. I gather arsenic is a poor release agent although lead would probably be good.
It is possible that growing things in, say, dustbins, could expose us to some risk. IIRC there are various coal tar extracts that are a bit horrid (you know the plastic smell that you get on non-food containers sometimes). Personally I would avoid these for growing food, just in case, although I would be surprised if anything was deposited in the tissue of a plant.
That's my 2p spent.
