Administrators have full control of the content they accept and they decide whether sensitive content (violence, pornography etc.) is displayed by default or not.
Being free doesn't mean being above the law! Each PeerTube hosting provider can decide on its own general conditions of use, abiding by their local laws.
Consequently, PeerTube development and/or management of websites associated with the PeerTube project (<a target="_blank" rel="noopener noreferrer" href="https://joinpeertube.org">joinpeertube.org</a>, <a target="_blank" rel="noopener noreferrer" href="https://instances.joinpeertube.org">instances.joinpeertube.org</a>, <a target="_blank" rel="noopener noreferrer" href="https://search.joinpeertube.org/">search.joinpeertube.org</a>, etc.) may not please everyone (in particular because of different ideas, ideologies of cultures).