Annoying but not inconsisent - Rose breathes in, so she could breathe out. Reinette was simply remote desktopping into the Doctor's mind, and only had to comprehend bits at a time. If anything, being thrown into "ordinary obscurity" to prevent unintentional access of Time Lord brain stuff is more like the John Smith / Yana routine.

But yes, Donna is quite clearly saying she doesn't want to have her memories removed - and having this forced upon her is uncomfortable to watch.