It's really like any question involving an entire demographic . . . . . the answer will vary based on the several thousands of individual personalities, communities, lifestyles, personal circumstances of teenagers engaging in sexual activity.
I voted neither good nor bad - simply because there is no immediate physical or emotional danger of engaging in sex unless the person hasn't thought the facts or implications through i.e does this person care about my welfare? are we using safe sex practices? am I confident enough to go ahead with it?
If unsure, don't have sex.