Suppose I have a paper #1 which was accepted by a Very Respectable Journal, and has been assigned a DOI, but has yet to be actually published (i.e. it's in the queue, and the DOI is not "activated", so it doesn't work for now).
Suppose, at this point, that I write another paper #2 in which I cite paper #1, saying that it is accepted by Ver. Resp. J. In this case, should I or should I not provide the DOI?
The possible downside of this is that someone may try to use the DOI before it goes live and be confused. On the other hand, if someone reads the version of paper #2 later on, the DOI may be more helpful than mere mention of the paper being accepted at Ver. Resp. J.