avi,
Sure, that's what my manual says too.
There is nothing there that says anything about either of the scenarios I outlined. Not dumping on others has nothing to do with "Catching your own fuel", and it doesn't seem like "The guys that designed them" actually publish any material that suggests it's possible.
Yes you can land overweight if necessary.
Can you provide ANY text that gives guidance as to how close a TS needs to be before that is preferable to jettisoning to MLW for fear of it setting the trail ablaze, and that fire spreading to the Aircraft?
If you want to cite manufacturers recommendations in favour of your arguments, you need to CITE manufacturers recommendations- I suggest you cannot do so.