If you catch a bad line, you can do 2 things:
1. Hit that shit and take the risk of your bet being cancelled. If you 'cap, you might as well try it... but if you scalp, then it's really not recommendable, as they might cancle your good "leg"
2. Tell the book about it. If you choose to do this, 2 things can happen
A. The book thanks you and throws you a bone
B. The book thanks you and that's it.
If B, you can do 2 things:
I. Whine like a PMSing bitch
II. Get on with your betting and forget about it.
That's it. Many times, the men on the hot chair remember the courtesy and return it some time further down the road, but no bonus should be expected for doing the right thing.
Then again, that's just my neophyte opinion.