If you pay attention to the warning, and stop doing what you got the warning for, there is no danger of losing your account. If you don't pay attention to the warning, then infractions, usually worth 10 points, will be handed out. 30 points, 3 infractions usually, result in an automatic ban. Read through the whole thread that Danny posted for more info.
Locking as this is posted in the wrong forum. Questions like this should be in a PM to the mod who gave you infraction, or in the Help Desk forum. Where exactly is your GT5 question?