Griefing is serious stuff. I honestly, truly hate it with a passion. Griefers have no desire to do anything but to ruin other players fun. They are not a productive addition to a server. Almost every day I log on there are reports of griefing. Players can't enjoy the server because every day someone is losing days of progress in minutes because someone thought it'd be entertaining. If a player loses their entire house to some griefer just because the griefer either thought it'd be hilarious or because they had a bad day and wanted to take it out on others, it sucks to log on and see that same griefer with a minor slap on the wrist like being banned/demoted for one day. It's like being bullied all year and finally seeing the bully get caught, only for them to get suspended for a day. It's not justice, and it's not fair.
A server like this is a community server. It doesn't function properly if people are allowed to grief because punishments are just slaps on the wrist. People need to feel like their work is safe, that they can trust other players. Weeks of progress they have made is openly in the hands of everyone else. They're not going to really enjoy the server if they constantly worry about it all disappearing overnight.
If you actually want to be a part of this server, if you actually enjoy it this much, you wouldn't even consider griefing.