A pause would be worth while even if results were skewed. While someone could cheat by printing out the puzzle, it wouldn't happen enough to affect total scores. It is so much easier and faster to work the puzzle online rather than on paper, I cannot imagine anyone going through the bother for hundreds of puzzles. This site is the reason all my puzzle books are gathering dust. Okay, I'll admit I like the idea of trying to beat a few stars, but it's mostly for myself, and a few attempts at cheating by others wouldn't be a big deal. My poor dog would like to not wait until I finish a puzzle before going out. Plus so often my phone rings. Now that the new season is starting, I'd like to use pause to work puzzles during commercials.
So kindly disregard any potential cheaters. The benefits of a pause outweigh a few naughty people.