No, the person who unfairly takes advantage of a weakness in gameplay is the one who is to be blamed.
You don't go around defending people who glitch themselves inside a wall so they can shoot others without being in danger themselves, do you? Spawn camping is pretty much similar to that, finding a weakness and exploiting it.
That is not even a close comparison. My spawn is right next to their spawn. I get killed, I reup. They get killed, they reup. If people werent so worried about scores, most gv battle spawns would be great. But instead, if there is another tank there, people are affraid to come back.
If I up into a camped spawn, I keep coming back, I don't chicken out. And if its so heavily camped that I die before I even load multiple times, I go grab a b29 or lanc or mossy 16 and bomb the little bastages at the front, bail (except in a b29)... and then I return in the tank. Otherwise, I try and bring more armor in.
Its funny how you seem to think that once a spawn is camped, it can not be broken. Some of the best battles I have ever had in the last 7 years playing this game came from running a nicely staffed mission into a spawn battle. When that is done, a even battle can errupt and last for hours!