Well, I was lucky (kind of) - all I had was one brief glimpse of her photo on my H's laptop and a first name. I think it's harder for people who know the OP or have met them in person.
Much worse was reading H's "love letters" to her.
Still, I would think the pros out weigh the cons.
BTW - horrible thought here - you don't have any suspicions it IS your best friend, do you? He wasn't trying to tell you something????