From what you've written, it sounds like it's not okay go undercover to expose abuse. I disagree. It's in the public's interest to expose this abuse, because

From what you've written, it sounds like it's not okay go undercover to expose abuse. I disagree. It's in the public's interest to expose this abuse, because the activity is inhumane, immoral, and likely illegal. It's not uncommon for journalists to go undercover to uncover the truth.