Who should be excluded from reviewing
You don't have to do the job of the editor and list every possible collaborator with whom you'd have a conflict of interest. If these people are asked to do the review, they should be the one to warn the editor. You can list people that you think wouldn't be obvious, but again you are under no obligation to do this.

As the first question you link to alludes, excluding reviewers is mostly because you think they'd be unfairly biased against your work.