This is nothing new, only to illustrate:TM pane
... and the editor:
Next stop: numbers with percentage-symbol, then.
While 1 and 3 are bad style and deserve a false positive (if the numbers are separated in the target text, and they should), cases 2 and 4 is a bit different from above because of the comma. Would a rule be necessary here (only consider numbers with 1 to 3 other number separated by a space (and perhaps additionally a comma) as a number? On the other hand side many OCRed docs tend to have such numbers.
These cases should perhaps be kept in mind, at least that they may happen. I did not want to create more problems (maybe there is a very simple solution to resolve all this, maybe a question of "what is more probable?"). Happy holidays.