Mass Select Reporting results
After running a report, you have to select each individual items that you want to affect. Ctrl+Click or Shift+Click are not currently possible and would help out manipulating the results.

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Tray commented
It appears there is not a way to perform bulk or multi-selection on report results. In my scenario, I have run the Checked Out Items report, which found over 30,000 documents that we need to check in. Rather than attempting to check all of these in at once, I'd like to be able to select a couple hundred at a time. Unfortunately, shift or ctrl doesn't seem to allow the selection of multiple items.
The only way I've found to do it is by manually clicking on each item. The ability to perform a bulk selection using shift would make the process much easier.