I encountered this yesterday while writing about PMID, PMCID and DOI identifiers.
From the webpage:
This page creates biomedical citations to use when for writing on websites. In addition, the citation maker can optionally quote the conclusion of an article and help present numeric results from clinical studies that report diagnosis and treatment.
There is also a bookmarklet if you are interested.
Automatic formatting of citations is the only way to insure quality citation practices. Variations in citations can cause others to miss the cited article or related materials.
I don’t regard correct citations as an excessive burden. Some authors do.