Actually, I have nothing against the so-called "camping". As already stated by most others, "camping" is something that is not really existing in RO - but that does not mean that it really does not exists.
It is "in between" existence and in-existence.
Sure, you could call someone who is sitting in a capping zone a "capmer" - but also a "tactical gamer".
One of my favorite lines concerning this topic is "Camping is a legal tactic."
But personally, I would change this line a bit:
"Camping is a legal tactic, as long as there is a chance for the enemy to negate it."
This - basically - means nothing more than something like Spawn- or Spawnexit-Camping should be avoided, because it can be very unfair.
As long as it is maybe one or two guys, camping the spawn exit with their bolt-action-rifles from the distance - no problem, should not be a problem for a good team.
But: When there are sitting three or more guys directly in a corner at the spawn-exit, camping it with Papasha's and invulnerable for grenades, waiting for some more guys to camp the exit...this is no more fun, it is even unfair. And should be banned from every server.