Personal information on internet

I always remember when my parents told me as a child, that I shouldn't believe everything that I read or see in the internet. Nowdays, they believe the fake news more than I do but, I still knowing that sharing personal information on any website it's a bad and dangerous business. There are sick people all over the world, so I preffer to share just the necessary and only with people that I use to speak to. Actually, I only use Instagram, because I like to have beautiful pictures that remember me old trips that I had, and I can imagine myself there, feeling the wind in Torres del Paine or something. The other social medias are useless for me, and as I said. I just put the limit at the moment that I decide my friends on Instagram, so I share the information with a few people.