If you grab data hosted on facebook or any other website, without having an account, where is the explicit contractual agreement? Are HTTP requests contractual agreements? MITM/DPI'ing facebook users who connect via your hardware contractual agreements?
The extent that is abuse, is that facebook (or any other site) service is engineered in such a way that makes such information it collects available to any degree in the first place. True, anyone can make dubious claims of abuse.
>Also, how does the provided link support claim that they are not necessarily enforceable legally? I read it but saw only criticism of TOS in general, nothing about whether they are or are not legally enforceable.
"These "terms" are actually purported legal contracts between the user and the online service provider (websites MMORPGs communication services etc.) despite the fact that users never get a chance to negotiate their contents and can often be entirely unaware of their existence."
purported legal contracts != legal contracts, i.e. just because someone says it's a legal contract, doesn't mean it actually is.