are the people who are winning tournaments camping.
No. However, are these people able to camp if they need to? Yes.
If you are in the finals, last match, you get to counterpick, are you going to go on a stage that will give both people a fair match, or are you going to go to a stage where you get a really good advantage over your opponent? If you say you would go to a fair stage then you are lying.
Also I would like to make something clear. There is a huge difference between camping and spamming. Camping you run all day and shoot stuff to give them damage so they have to keep chasing you. Spamming, which is what 5150 is getting confused with camping, is where you stand on one side of the stage and spam lasers to make them approach you. Spamming you don't run when they approach you, camping you do. Up Bing on corneria is not camping, because you are not running. If you did run, you wouldn't be able to up b all day.
I do not support camping, or spamming. However, there is a difference between being able to run all day and having a good advantage. Pokefloats and Rainbow Cruise make camping possible, which is why I support them being banned. However, corneria can be bottle-necked, because in order to run, they have to go over the fin, which makes them catchable. Corneria give an advantage, because they have to go through your projectiles/up Bs, however once they get to you, you are fighting. The sides are small, the ceiling is low, it isn't hard to KO in the stage. You talk about corneria like it is impossible to go down by the back and fight. It isn't. If the stage is so easy to learn, then why can't you fight on it? Because it isn't.