That sucks Stacey.. did you call the police??
As for the american stuff... I lived there for a year and LOVED the way americans celebrate. Everything was a huge parade and dressing up and a lot of fun. As someone who loves dress ups and celebrating things (yes, even the mundane) I had a lot of fun. Halloween would be very depressing, as would most celebrations I could imagine, being an American living in Australia. It just isn't the same.
However.... I think that's the point people are trying to make. It is culture. Americans have a culture of getting very excited over everything. I loved it while living there, but it just isn't the typical Australian thing to do, and that is why people are saying "it is american". We celebrate different things. I think people get annoyed because it seems at times that Americans feel as though their way is the best way. The paragraph I have highlighted shows what I mean. Australians actually DON'T have 95% of our shows being american. Quick google search shows that 3 years ago 55% of our content was all Australian, over 30% of the rest being British and the rest being from other countries, and those other countries being NOT just USA. Since digital TV the percentage is now 35% of Australian content and a higher content of British TV and American TV. Old shows, to fill in the new spaces. Not less Australian content though, we have more shows being made just a lower percentage due to the extra channels now.
If an English person came in and said we watch a heap of their TV shows and rip off their culture then I would say that's a much fairer call. But there is actually less American influence than you would like to think. I certainly found the culture gap very huge while living in America. One thing I did notice, is the tendency to think the rest of the world only concentrated on America and looked up to America. Which is wrong. Even a lot of well educated Americans make fun of the assumption.
I'm not anti USA at all. Just don't overestimate your influence on the rest of the world.