In the last few lessons, we were talking about advertisements and it's problems. In my opinion, the advertisements have a big influence on the society and so they're dangerous. I think that the people who don't search information themselves are more easy to influence because they have no own opinion, so they believe everything.
I found a funny advertisement on the net. It's an ad for an insect spray, which shows that it is so strong and effective, that it kills even spiderman.