Is it obligatory to avoid foods whose ingredient symbols are said to be derived from pork, and is it obligatory to disseminate this warning?

The default ruling for foods is permissibility. A food is not deemed unlawful unless it is proven that an added ingredient is impure (like carrion or pork). However, this cannot be asserted merely based on an article, unless the source is reliable.

If it is proven to be extracted from pork, then one must consider whether it was added before transformation (in which case it would be impermissible) or after (in which case it would not become impure).

In summary, the default ruling is permissibility, and it is only deviated from based on confirmed evidence from a reliable source. And whoever abstains from it out of precaution against doubtful matters is commendable, based on the hadith (definition): "The lawful is clear, and the unlawful is clear, and between them are doubtful matters..." (the rest of the hadith).

It is important to verify research before publishing it so as not to confuse people.