Is that only for ext3 fs?
I notice that ext3 performs a forced file system check every 20 something mounts, does setting the maximum mount count to 0 stop this?
Well ext2 too, but personally I wouldn't set it to 0 on an ext2fs.
And yes, that is exactly what it does, I have noticed that LMCE has a tendency to remount certain partitions a lot, causing them to go over this count on every reboot. If you don't change other settings they will still be checked but after 180 days (IIRC) which I think is still a good idea.