Referring to, for example, answers like this.
Link-only answers are generally frowned upon on SE as a whole as they are unreliable (due to the potential to change, move or disappear) and clumsy to use. The 'How to Answer' section of the Help pages says this:
Links to external resources are encouraged, but please add context around the link so your fellow users will have some idea what it is and why it’s there. Always quote the most relevant part of an important link, in case the target site is unreachable or goes permanently offline.
The consensus is generally to delete link-only answers altogether; even if they are highly-rated and/or accepted.
This is exacerbated by the fact that SDL Live Content requires a login; making the free, public resource of the Tridion StackExchange utterly useless when answers like this are posted. Although Tridion is not open-source or freely available, StackExchange resources should be (and if they can't be, then SE is not the right platform).
We have the additional problem, here, that it is presumably frowned upon to quote large sections of Live Content for the same reason that it is not publicly accessible.
So how should link-only answers to Live Content be handled? I am in agreement with the consensus that link-only answers are useless and should be deleted; even moreso if the linked resource may not be accessible.
Perhaps, if quoting Live Content directly is not acceptable, then it should only be acceptable to link to Live Content as a supplement to the answer, which should provide all relevant information directly, and not as the main feature of the answer itself? After all, if the answer to the question is just "go and read the documentation," the question should probably be closed anyway.