system A is partners with system B, and has been for a while. system B introjects the host of system A, totally by chance and due to the fact that they are extremely close and have been partners for years.
system C thinks this is funny, and decides to "make an alter" who is an introject of system A's host. mind you system C barely knows system A. within 10 minutes (not exaggerating) of system C saying they want to create this alter, the "created alter" is done and is talking on discord. system C's "created alter" repeatedly refers to themselves as the same person as system A's host, and the rest of system C encourages this. system A expresses discomfort with this, and states they would rather not interact with system C's "created alter". then, a few days later, system C magically finds out that their "created alter" is "not actually system A's host" (as in the "created alter" has a different identity/is not an introject).