Can anyone think of a challenging scenario for an Interventionist? Help!!!?

Ok so I have to come up with something challenging that will make an Interventionist think. So for example, I was thinking promoting the use of condoms because they would say oh well that soundds good. People will be protected against ually transmitted diseases, but on the other hand, it may also encourage people to have and become promiscuous. What is something about this scenario that they wouldn't be able to solve with their view? Please help thank you :)