Honestly the ads you have right now are pretty lame. Sorry to be harsh. No real visual movement through them, type needs a lot of work, and your just adding thick blocks to all of them to put the type on.
Some suggestions: Stop centering all the text. Make a clear division with them by using different weights not different typefaces. You need to get better imagery and lose some of the boxes or fade them out. The last ad makes the guy look like he is floating. You need shadows to make it look correct. Another thing with your type – I think you chose the wrong ones. You have some very geometric shapes, like the perfect circles make it seem to playful. The last ad with the slab serif is fine, its bold type for a bold statement. But lose the boxes and find better images for it. Also try to summerize the title more. When you are reading a poster think about the context. People won’t want to stand around reading a long title. They want to be able to see a clear decisive title of about 3-4 words and if they find it interesting read more.
The point is that most times, tobacco companies advertise bottled water, but they will use their company color to do that. They are indirectly pointing viewers to the main thing: tobacco smoking. These ads are not basically against smoking, but against surrogate advertising strategies used by tobacco companies.
Wait. Are you actually saying that when I see an ad for bottled water somewhere, it’s actually created by a tobacco company trying to get me to buy their brand of cigarettes? I’ll need to see a concrete example of that.
(The fact that I’m asking this, is already proof that their ads, or yours for that matter, don’t get the intended message across. Getting a strong “conspiracy theory” vibe from this to be honest.)