Not Exactly, Actually facebook auto liker is an exchanging based system. But we have huge number of tokens in our database to provide likes to our users. so most probably you'll not like other's status or photos.
IS IT UNSAFE ?
Absolutely No, we never spam your profile in our website. so there is no chance to get blocked. we will not harm our users
Why should i provide my access token ?
Facebook Access tokens are used to transfer likes to your profile. Without access token you cant login to our website !
Why should i keep my privacy settings as "Public"
If you're not keeping your post privacy as "Public". Likes cannot access to your Posts.