Final answer:
Webmasters may not always directly control the content of websites due to user contributions and the lack of regulation on the internet.
Step-by-step explanation:
Webmasters may not always directly control the content of websites. While they have the ability to create and manage the overall structure and design, the actual content may be contributed by various sources such as users, contributors, or automated systems. For example, social media platforms like Tumblr allow users to post their own content, and websites like Buzzfeed and Yelp rely on contributions from their community members. Additionally, the vast amount of information available on the internet is not regulated for quality or accuracy, and anyone can publish almost anything they wish, making it difficult for webmasters to have complete control over the content.