I own a pro shop and throw plugged balls. I reiterate what the above posters comments are...you can even go so far as to look at the flare pattern. As long as the ball isn't going to hit the plug on the second half of the track flares you'll be fine. You don't want the ball hitting plug in the last 30 feet of the lane, before that though won't hurt anything.
Little known fact: In Russian "Hope" and "Change" translate to "Tax" and "Spend"