This only applies if you care about what you place to begin with...
PokerStars freeroll this afternoon 6103 entrants. I was in it for an online league that I just joined. Within the first 45 minutes, the field was at about 2800 (I think) and I was up to over 20,000 in chips and I had to go to work so I had to shut down. I just went back in to see what I placed and I WAS STILL IN IT 2 hours later.
About 25 minutes into the tourney I got moved to a table with one of the "I've got to go" guys, and he was doing the all in thing. I doubled off him three times and took him out.
So not only did I build my chips from someone who should have just hit post and fold, but I also posted and folded to 146th place. Not great, but I knew I wasn't going to be able to play it all, so this was a great result this time. If only I didn't have to go to work.....hmmmmm