We are opposed to that too. See the package insert and read what the first paragraph says.
There are warnings about Intravenous and Intramuscular administration including severe reactions including death in situations where subcutanneous injection is not feasible.
The Merck PDF document is available on the Web Archives site.
Archive.org ... AquaMEPHYTON_PI.pdf
Childbirth Information Network
First Strike – The Dark Side of The Vitamin K Shot