Here in Russia our local social networks are more popular than FB but I'd say they're way more toxic than FB. Some years ago it was very easy to find child porn with a few clicks. At least there's some conversation in the US going on the harmful effects of social networks; here no one cares. People in countries where FB is the only option simply don't have anything to compare it to; they can't know it's a pretty decent social network, compared to some.