"I'm pregnant" pranks

What do you think about these? I know a lot of people have very different opinions on them, some say they are insensitive to those who struggle with infertility. I just watched a prank video and the boyfriend was pretty mad at the girl saying how it wasn't his fault if she was pregnant. Would you break up with a guy if he acted crazy during a prank like this? That's what a lot of the comments were saying. Other people said she can't be mad at him for acting angry about it because she pranked him and it wasn't even a real situation. The couple seemed fine at the end, by the way. She didn't seem angry with him. What do you think?