WHY NOT? If dead people can vote in the U.S., why not use the identities of dead people assigned to actors faking taking the shot? Yes, the dead can vote, and the dead can fake a vax:
The woman who "took the shot" was apparently identified as a crisis actor using the identity of a deceased woman. But Twitter banned that post haste, only the tweet pictured above remains.
UPDATE: Nobody named Margaret Keenan lives in Coventry now, this really was a hoax.