They will do this in everyday conversation with strangers in hopes of teaching them about their obscure, dying religion. Baha'is are taught to lay traps in conversations which give them an excuse to bring up what they really want to talk about. This may range from anything.
To protect yourself from Baha'i Jacking, just ignore them unless actually interested. If interested, make sure you actually research it.
Sally: What happened?
Bob: I told him to stop Baha'i Jacking and that it was really proselytizing... something Baha'is aren't supposed to do. I was offended.