Is it ethical to work in media analysis?

[Elisabeth]

Dear everyone, 

I'm finishing phd, and I'm not continuing science, so I'm looking for a job. I've been offered data analysis work in a company, which is quite respected for doing pre-election voter surveys and other public polls, but also, they do media analysis (to see which demographics watches what media and when) and sell their results to marketing companies. This means I would do some kind of research with no control over how my results are being used to target advertising. Is that too bad? 

I've done the life-purpose course, and got something out of it - I'm now running a personal development and  sharing group for students at my university, but that's far from becoming a career