i really struggle to see where the fun is in just getting kill stats for yourself. i would far more prefer to be running around getting in amongst the action and get killed in the process than just staring down a scope for hours.
You struggle to see where one person enjoys sniping because you don't enjoy it. As with most of the so called "cheap tactics" the basic idea is simply that you enjoy your playstyle and believe the other guy ruins your playstyle therefore it's cheap.
As I said earlier, Bunnyhopping, Drop shotting (dolphin diving), and strafing only touch the edge of cheapness when the game mechanics allow the behavior to exploit something that was not intended.
Being able to hop around and gain speed of movement and not suffer accuracy drawbacks is a game flaw, the action itself is fine.
Dropping to the dirt and suddenly having the accuracy bonus of being prone (as well as temp invulnerability in some games as you drop) is a game flaw, the action is basic military tactics 101 stuff.
Running back and forth spraying bullets accurately 150m across the map at the sniper hiding in the window because you don't suffer an accuracy penalty for moving (or gain the benefit of a bad random spray program) is a game flaw, the tactic is fine.
Spawn Camping is cheap, yes as someone else said it's "their fault" if they get camped but if you think that makes it any less cheap to [censored] a bunch of poor players as they hop out of their spawn one by one that's pretty shameful.
Camping is an all encompassing word of the behavior of setting up shop in a single location, the problem is that with some of the more negatively viewed behaviors you can't really tell if he was "camping in a cheap way" or if you just got killed like a fool unless it happens repeatedly, and even then you have to question whether or not his location is active and benefiting his team.
I see far to many people rage on "camping" because a guy stopped moving for a few seconds, stepped into a corner and shot his persuer in the back as he came through the door, or the guy sitting facing away from the action because he's covering his teams ass from flankers, or the sniper who finds an advantageous position and makes the most of it.
If you want to be mad at the guy who was lying under the table with a shotgun and shot you in the legs the last four times you walked into a room, be mad, but stop walking into the room you moron.