UPN was less hands on than the WB according to various interviews. Marsters notably stated or summarized - the switch from WB to UPN was a bit like no longer having the parents in the room. UPN had not standards and practices moderator or even rules - since they were showing Jamie Fox reruns, Wrestling, and Voyager. Mostly their own content. Then they acquired Buffy, and gave Whedon carte blanche. So things the WB would not permit - for example body piercings, popped up in the first episode that aired on UPN. Smashed? No way that would have aired on WB. Dead Things? Forget about it. Seeing Red? Not in this lifetime. WB was pretty stringent. They notoriously axed an episode David Fury wrote for Angel in season 1 Angel - made Mutant Enemy rewrite it.