I'm running an LG DVD burner right now and have never seen, nor heard of anything like that happening. They make one the the better drives available.
EDIT:
After doing some poking around, some are reporting that LG has included a program called "BlueBirds" into their drives. It is simply a drag and burn program, it is not ad-ware. There is a firmware update that removes/disables that program: LG Product Support. It can be found under the Drivers & Software tab.
I honestly wouldn't recommend the CM-690,
Sure it may be huge and tooless
but it just INVITES dust
I think its made of mesh(someone correct that)
and the dust gets everywhere
That allows for alot of airflow, but I have to clean my case like once a week.