Geez, I swear, most of people who talk about how this and that product have been "linked to X and Y", I'm pretty sure they either have no real clue about the studies they refer to, or they do get the implications of "linked with" but are trying to make their articles more punchy by making it seem like a very big deal that is a Big News!
Seriously. Stuff like artificial coloring can be linked with cancer if at X quantity they show it has an effect on rats ingesting it and can them demonstrate some sort of correlation and usually, if a chemical has an effect at X dosage on rats, it will take a much much much higher dosage on humans (hence regulations etc) but a lot of the time, it would be impossible to ingest enough that it would have any effect. Hence why it is still sold. But people like to make a fuss about it and make it look like a big deal. It gets people talking and linking.
(and sure enough they are also the kind of authors who talk about "Superfood!" because, hey, buzzwords are buzzwords)
Good catch on the rust, though. Equipment should always be checked well because of possible rot/mold/etc!