One of the characters I'm dealing with currently is a student of medicine who's come up with a rather elaborate scheme for his Embrace, gathered from high-generation vampires who couldn't care less about the Masquerade. (Their fates, as well as the standing of such a Tradition-violating new Kindred, lie not within the question's scope.)
One of the rules about the Embrace states that a direct vitae flow must happen between sire and childe. So, to prevent any actual dues owed to the sire, he has decided to kidnap an unwilling high-generation vampire, and via an unholy contraption of IV bags and an assistant's help, drain himself of blood and then have the staked would-be sire bled into his mouth enough to fill the Vitae quota for an Embrace. Then feast on his own blood to prevent frenzy.
Assuming that a vampire can be captured by a capable kine via the virtue of being a dumb vampire, this poses several risks.
The big question being "Would the Embrace happen?", can already get a weak "yes" from the canon via the example of Dracula and Lambach Ruthven as to whether a forced Embrace is possible, yet from what I know of it, it happened more or less traditionally, while this spin on it takes away a lot of the "safety" of the traditional way to force an Embrace from an unworthy vampire.
This is assuming the V20 version of the rules.