I found Wikipedia's Terms of Use on the Wikimedia site. I didn't read through the whole thing but I used ctrl + F and found nothing about PR firms, companies and corporations and censorship. However there is a section titled "4. Refraining from Certain Activities" and one sentence says Engaging in False Statements, Impersonation, or Fraud and another says Engaging in harassment, threats, stalking, spamming, or vandalism; Now on Wikipedia, vandalism means editing an article in an intentionally disruptive or malicious manner. There is also an article on Wikipedia bout the censorship issue.

The issue of censorship on Wikipedia continues to be debated, although for the most part, the concept that Wikipedia is not censored holds strong dominance. On Wikipedia, the general concept is that concepts should not be censored, and that media which illustrates such concepts should likewise not be censored, if it has encyclopedic value. Determining whether something has encyclopedic value is subjective and debated. Beyond that, the varied landscape of legal doctrines (and related discourse) influence what can or cannot be on Wikipedia.

On the bottom, they do link to articles where they list blacklisted titles and images. The only one with the word trans is first male to female transsexuall #A specific page which needs to be SALTed and redacted.