I don't think a basic social network starts out creepy, and quite a lot of effort goes in to implementing the features that enable it to become creepy. Non-creepiness is not a requirement, it is a constraint, such as 'no retroactive default boundary-weakening' and 'do not send email that dishonestly misrepresents the intentions and views of your members, and particularly not of specific members by name.' It is not that hard.