Last night, during beer can races, I was crewing on a 32' monomaran. We were on a reaching leg just to leeward and behind another boat. The skipper of the boat I was on started to come up to try to get an inside overlap on the other boat as we approached the next mark. As we came up we ran over a line that was dragging behind the boat that was above us. Did the other boat "foul us" for for failing to yield right of way to a leeward boat? I posed this question around the bar following the race and the concessus was no, no foul occured. OK...I accept that, now....what if that boat was rounding a mark, and the line trailing behind them hit the mark, did that boat hit the mark and have to do a turn? If yes, what is the difference between the two scenarios????