Leeftijdsgrenzen social media platforms. Wie houdt zich er (nog) aan?

Platform Minimum leeftijd Waarom?
Facebook 13 Veiligheidsmaatregelen (volwassenen die inhoud delen of contact opnemen). Tussen 13 en 17 is alles posten wel toegestaan.
Google+ 16 “Als u in Google+ en andere Google-producten een geboortedatum opgeeft die aangeeft dat u niet oud genoeg bent om een Google-account te hebben, kan uw account worden uitgeschakeld.”
Instagram 13 “You must be at least 13 years old to use the Service.”
Pinterest 13 “Any use or access by anyone under the age of 13 is prohibited.”
SnapChat 13 “Snapchat is intended for use by people who are 13 years of age or older, and persons under the age of 13 are prohibited from creating Snapchat accounts….You affirm that you are either more than 18 years of age, or an emancipated minor, or possess legal parental or guardian consent, and are fully able and competent to enter into the terms, conditions, obligations, affirmations, representations, and warranties set forth in these Terms, and to abide by and comply with these Terms.”
Skype 18 “…if you are not of legal age to form a binding agreement with Skype.”
Telegram ? “niets over te vinden.”
Twitter 18 “You may use the Services only if you can form a binding contract with Twitter.”
Viber 13 “The Service is not intended for children under the age of 13.”
WhatsApp 16 “You affirm that you are either more than 16 years of age, or an emancipated minor, or possess legal parental or guardian consent, and are fully able and competent to enter into the terms, conditions, obligations, affirmations, representations, and warranties set forth in these Terms of Service, and to abide by and comply with these Terms of Service. In any case, you affirm that you are at least 16 years old as the WhatsApp Service is not intended for children under 16.”
Yahoo! (Flickr, Messenger) 13 “Yahoo is concerned about the safety and privacy of all its users, particularly children. For this reason, parents of children under the age of 13 who wish to allow their children access to the Yahoo Services must create a Yahoo Family Account. When you create a Yahoo Family Account and add your child to the account, you certify that you are at least 18 years old and that you are the legal guardian of the child/children listed on the Yahoo Family Account.”
Minecraft 13 “If you are under 13 years of age, you should not use our Website.”