[1023mb (OP)]

So I've had an idea that combines 2 things, black holes and string theory.  What if the center of black holes can get so small they CAN interact with some or all of the extra dimensions proposed by string theory?  Is that even possible?

[Kryptid]

I've actually never thought about that before, but you may have a point. I admittedly don't know what kind of effect that would have on the black hole's behavior or if we could even detect any such anomalies (the behavior of a singularity is hidden behind an event horizon).