No camping isn't.
Camping adds a challenge to the game, if a camper is holding down an area a run and gunner must use their intelligence to flank them and take them out via an alternate route.
K/D itself doesn't mean anything, i can go and play on a negative k/d account and it makes no difference to how i play.
I aim to keep my K/D as high as possible because it adds abit of challenge to the game, im naturally defensive(although i rush on s&d) so my K/D is higher than players that choose to constantly push forward. It by no means indicates that i am better than them.
I believe K/D in my case shows how effective i am as a player because i play 99% kill dependent modes such as Core TDM and S&

and its close to my Win/Loss ratio too.
In this game camping just means anything where you are defensive, if ive ran around the whole map and take cover behind a box and kill someone im still called a camper.
If im playing TDM i will go to a building with lots of players in the area, plant a claymore to watch my back and then kill people whilst moving between the windows of the building.
If i get Special naded, or UAV shows someone nearby il retreat to a corner with akimbo rangers and wait for the person trying to revenge kill me to come up, people class the whole shotgun/corner thing as the worst kind of camping but in my opinion if i 100% know your coming to kill me when im on a killstreak then im going to do it to guarantee myself the kill. The only other option is running down myself and make a situation that was 100% in my favour, a 50-50 shootout.
at the end of the day play how you want if you purchased the game, theres so much bs in this game that camping should be the last of your problems(MLC, N00btubes, OMA, Danger Close, Overpowered Killstreaks etc).