We are not responsible for your equipment, including theft and damage that may come to it during the party. We aren't responsible for injuries to you either. Luckily thefts at Demopartys are a rare exception. Still: When leaving your seat for a long time, it might be a good idea not to leave too valuable stuff at your place. Neither the organizers nor the security staff can keep an eye on everyone's luggage, so watch it for yourself, and consider not bringing expensive things with you if you don't need them on the party.
Drinking hard alcohol is explicitly forbidden inside the main party hall (but is ok in the beer tent & garden). Drunken people will not be allowed to enter the main hall. We can understand if people want to drink some beer, but keep the harder stuff out of the party hall, and also limit your drinking to a reasonable amount. If you get drunk and start annoying people, you'll get thrown out. If you damage something, you'll have to pay the repairs. If you vomit and aren't in the condition to clean it up yourself, you'll have to pay the organizer who did - and it won't be cheap. For not getting kicked out of the party it is absolutely essential to follow your Covid-19 security rules. Drunk people typically are not able to follow such rules well. If you aren't absolutely sure you are able to follow rules when drunk, we highly recommend not to get drunk in the first place. Do you really want to be kicked out at the middle of the party, sitting drunk and lonely on the street?
Gamers will be thrown out. Don't play games at the party. Don't spend your time leeching and watching porn either. If you do, don't expect people to be very friendly towards you, and don't expect the organizers to help you either.
Respect German Law. Illegal actions, especially hurting anyone or damaging anything (including intellectual property such as the network), will definitely have their consequences. Better don't try and find out which.
Keep your kitchen equipment, heaters and cheap extensions sockets at home. We do our best to keep a solid power supply, but this kind of devices often trigger the ground fault protection, possibly leaving several rows without power. That protection is there for your own safety, and also required by German law. We won't refund half-written CD-Rs after a power failure. You're not allowed to use extension sockets that don't conform with the VDE norms (meaning they are either defect or don't have earth contact).
Last but not least, have fun!