YES. Especially the impenetrable 'terms and conditions' before use. I would like to see these simplified and put into a minimum number of short sentences. Such as - 1. If you want to use this service you agree to us using all of your information in anyway we want to. 2. We will sell your preferences to marketers so they can plague you with advertising so you will be tempted to buy buy buy.
If enough people opt out then these organisations that know and share all of our interests, sexual preferences,
shared thoughts, political preferences, and more will need to modify their exploitation of this.
As many wise people say - if you do not want the world to know something about you, do not ask about it / comment on it / show photos of it on the web.