Guerilla marketing and advertising

I was just on an awesome website, because once again I was bored and decided to look up some of 'the most interesting advertisements ever' (that was what I typed into Google). One site lead to another and now I am looking at types of advertising that hits people deeper than most do, because they provoke emotions and feelings when someone just looks at it. I am going to include some photos of what I saw and I want to find out from people who agrees with this type of Guerilla marketing. I know this is an advertising class I am blogging for. To an extent though these are advertising products or suggesting a specific action should be taken.
 Example 1: Red Cross

White square next to her says 'Know what to do'

Example 2: for the 'Death Proof' DVD

Example 3: Feeding the Hungry

All of these are startling ways to advertise or market a product, cause, etc. Some people probably think this is going to far. But is it? It provokes so much emotion and feel because unlike a print ad or commercial, it may be difficult to avoid or turn away from. These types are often found in larger cities, by companies who likely have a larger budget to work with. There is time and place for these and if seen at the right moment can provoke unspeakable reactions.