Seriously, it's a good question and open to a lot of different opinions.

Here's mine:

1) That's okay*
2) Don't do it
3) Don't do it

* Don't see something, quit, and get back on five minutes later to go pick it up.

2 and 3 to me are sketchy and 2 you might not get nailed, 3 if someone sees it you're done.

3 is clear cut cheating.