Finsh your games

I am new to this site and chess all together.  I have only actually played 3 full games.  ON my 4th one i was doing an excellent job, we were two evenly matched players making some really nice moves. And then all of a sudden my challenger leaves the game! Right in the middle of it! he left almost 8 games unattended! Is this a usual thing on interent chess? If I start 8 games I know I better have enough time to finish them. I find it kind of rude. What are your opinions?