Believe it or not, it's really not that hard to avoid having warnings placed on your account. After 20+ years of MMO gaming I'm yet to receive a single one - why is that?

It's because I follow the rules.
I don't antagonize, flame, intentionally go out of my way to make others miserable through my actions or speech.

If you, or one of your friends (who are so worried about purchasing future xpacs because they might get banned....lol) are receiving multiple warnings for infractions then perhaps it's best to modify your behavior instead of asking for flags to be removed after a year.

It's not difficult by any means to avoid warnings/bans.