It's most likely that Don Lemon was aware of the plan, circulated social media, to interrupting the service. Hopefully, as a former CNN journalist, he was aware of the FACE Act prior to entering the religious building with a camera during a religious service.
"Ms. Levy Armstrong, the church protest organizer, said she circulated her plan for interrupting the service on social media."
The Justice Department said it would investigate the protest over a pastor’s apparent role in immigration enforcement in the state.
www.nytimes.com