It looks like people have created /r/place alternatives. If you like /r/place, could just use one of those and go draw something neat and popularize that. I don't really see what drawing a bunch of images complaining about spez using the service that spez runs is going to accomplish. On the other hand, if people are doing neat things elsewhere, then other people might want to participate.
What made Place special was the rarity. It created a sort of internet time capsule of what was popular or in the collective mind at that point in time. If you wanted to get what was important to you on the board then you had to act with purpose RIGHT NOW because it would be over and gone in a couple of days. Even with all the effort put in it would be erased at the end. Just Dust in the Wind.
I remember, as a kid, once going to a Buddhist sand-painting exhibition at an art museum. They made these huge, beautiful mandalas by carefully shaking colored sand into designs. When they were done, they dumped it out into the ocean. I remember -- being pretty impressed with it -- asking something like "but why would you destroy it", and the Buddhist monk guy said something like "it reminds us not to be too attached to material things".
Don't know if I agreed with the guy, but I think that there is probably a very real perspective out there that ephemerality has intrinsic value.