After it's been exposed to use and light for who knows how long, and after being melted together at high temperatures, inevitably higher than the decomposition temperatures of at least a few of the dyes and additives in there, because precisely zero effort has been put in to purify it before being slagged? Yes I will turn my nose up, and you should too. No self-respecting chemist sniffs chemical cocktails of unknown provenance.

ETA: Also, your clothing note is a completely false equivalence, because the chemical at issue here is polyethylene, which has a far greater range and prevalence of additives than those polymers you named for use in clothing.