Just a little update in regards to two topics:
If you're going to run a community competition, make sure you get through with it to the end and give out the promised prizes. Don't make others waste their time and efforts for nothing.
These warnings do not decay. However, if you haven't violated the rules for over 30 days, you can message one of our forum moderators and they'll review your appeal. If you happen to have any of the serious warnings (depending on the violation), you'll have to wait up to 90 days.
If you'd like to get rid of that annoying warning banner next to your name, just follow the steps above. I'll be happy to help myself. :)