Plagiarizing may seem harmless. That's not the case. There can be several short-term and long-term consequences to plagiarism:
Short term: Plagiarism can ruin your college career.
From the A-State Student Handbook:
Faculty members may respond to cases of plagiarism in any of the following ways:
Long term: Plagiarism can ruin your career.
As more and more things go online and it becomes easier and easier to search, plagiarism is easier to detect than ever. Even if you get away with something now, that doesn't mean that it won't resurface later in your career. A plagiarism scandal could ruin your career. Look at the headlines below:
From The Atlantic https://www.theatlantic.com/politics/archive/2014/08/walsh-quits-senate-bid-in-montana-after-plagiarism-scandal/375761/
From The Guardian https://www.theguardian.com/world/2013/feb/09/german-education-minister-quits-phd-plagiarism
From The Guardian https://www.theguardian.com/world/2012/apr/02/hungarian-president-resigns-doctorate-plagiarism
And it's not just politicians who face consequences. Other recent cases in include: