That list is terrible:
3: pillows may be considered passive weapons but that is irrelevant unless it is used as such or carried in a context where it is likely intended to be used as such (e.g. while participating in a demonstration). That said, assaulting random people in public with a pillow is probably still illegal because it involves assaulting random people (albeit with a weapon that's less likely to cause permanent injuries directly).
5: Both drilling and throwing bottles into containers cause noise pollution. It's not the act itself that's verboten, it's the noise it causes.
6: This is the same thing as 5. The law doesn't give an exhaustive list of activities that might be too damn noisy so I have no idea where these come from.
8: Calling a police officer "du" is a sign of disrespect. If you're new to the language and struggling with the distinction, the police officer will likely correct you or ignore it. Treating police officers disrespectfully is a misdemeanor and addressing them as "du" is one way to be disrespectful.
9: This is a widely held misconception. The "Deutschlandlied" is not illegal. The national anthem only has one verse and that's the third verse of the Deutschlandlied (or actually "Lied der Deutschen"). You can still sing the entire song but if you were going for singing the national anthem, you'll spend two verses singing something that isn't the national anthem. The reason people will still look at you in disgust is the same reason the anthem only uses the third verse: we don't take to jingoism too kindly after WW2.
10: I'm pretty sure it's not a law that you can't drink Export or non-Munich beer at the Oktoberfest, considering the Oktoberfest is in essence just a private event, but it's Bavaria so I'm not sure of this one.