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I think this only becomes a problem when you find many duplicated pages, or even duplicated sites. And when those sites are on the same IP, have very similar design and have obviously been created to boost ranking and traffic.
If you want to be absolutely sure, tell your competitors to edit the text on the page a little. Cheers!
If you get caught and Google puts a ban on you, the whole site will suffer. Usually your page rank will go down and thereby your "value" compared to the competition. But in your case it sems so unlikely that you would have a problem. I have seen quite a few sites that have several pages of plagiarised content (copied and pasted text straight out of a similar site!) and they are still doing well in Google.