did you even read the terms when you joined?
its right there in bold print
Conduct
In your digital interactions with other users (including, but not limited to: site messages, instant messages, journal postings, and forum comments), you agree to conduct yourself civilly and respectfully. While using the website,you agree that you shall not under any circumstances harass or make mischief against any other user of the Website. Humor Rainbow reserves the right to determine, at its sole discretion, what constitutes harassment or mischief, and where that has occurred; and may, also at its sole discretion, partially or completely deny service to any infringing party. As part of these efforts, Humor Rainbow may enlist the help of its active users to moderate flagged messages, comments and other content to determine if a user’s conduct is harmful to the community.