I think we're going to find that when it comes to Reishi that's under the control of a strong individual, the Quincy won't have free reign to hijack that as freely as they otherwise might. I'd suspect that if a Quincy attempts to take the Reishi of a Banki it would probably have interesting results.
Question, If Hollow reiatsu is bad for quincies, how could Opie literaly absorb Allon's body and not suffer any consequences.
EDIT: Went back and re-read chapter 552. Quincies are not afraid of Hollow Reiatsu, it more specific to Arrancar's Ressurection. So Basically a Hollowified Bankai is the same as a Resurrection.