There are very few attacks which can break open a smashball instantly. However, when they are hit, a smashball is sent flying. Any lucas or Zelda or Pit or falco with a good projectile will be able to describe to you how easy it is for them to nab a smashball, well beyond even fast characters like Sonic. I'll use Zelda, again, because she has a good finalsmash, has a projectile and is a good representation of a character who can camp quite a bit. Din's Fire can do up to 16% damage- for something so ranged and controllable, that dominates smash ball grabbing. More importantly, there is so little risk to getting a smashball like this. Given that if the smashball is hit but not broken, it gets sent flying, leaving many characters, including sonic, in a wild chase frequently with the use of full jumps. Comparatively, even weak damage Falco lasers are more reliable, safe, and controllable methods to obtain a smash ball, as it lets you repeatedly aim for the smash ball, safe from punishment, from afar.
Link
Olimar
Zelda
Ivysaur
can all camp, in fact some of those listed are some of the best campers. Try playing an Olimar Ditto, or a link vs. Zelda match, and see how the mix up of projectiles and mindgaming makes up an approach game. Bowser, Ike, Charizard, some of the biggest and heaviest characters who can trade % and still win, all have approach options, like quickdraw, or more luigi-like projectile swatting approaches with superiority at medium-close range for approaches. For example, Charizard has one of the longest range if not the longest range grab in the game, along with long distance tilts and aerials. Ganondorf, I am unsure of.
And I'm sorry, but please double check on the landmaster aspect. It's true. The mechanics don't work the same way as other moving platforms- it's goofy physics but it's the reason why the landmaster hover is the faster and most reliable method to kill people with.
"very easily" is relative. A character having an advantage by forcing another character to approach because one has projectiles and can camp with them while the other does not sincerely does not mean it will be an autolose. You list a few and say that only they can do it. But that list misses characters like Luigi(tornado), Mario(cape,fireballs), G&W(bucket, turtle, and fishbowl), Pikachu(size, speed), Wario(bike, aerial mobility), Captain Falcon(speed), Kirby(size, and more), and others. To me, your list doesn't do much but actually reflect your lack of knowledge in approach game, which would result in an overestimation of camping. Truly, if camping were so effective, how can a character like DK be doing well in tournaments?
-A crazy glide toss against anybody with items
-Extremely powerful options out of shield
-Double bair approaches
-Ftilt approaches
etc. all let him handle the campers when we're talking GOOD players.