Objects can still go that far when bounded scrolling is on. You just can't scroll that far. If you want to limit how far it can go though, you could do something like:
+ Sprite X is greater than 10000
-> Set sprite X to 10000
Also note because positions are stored as floating point values, at such high numbers as 2,000,000,000 you'll probably start to lose precision on the pixel scale. I wouldn't advise letting anything go that far!