I try to ignore them also. After all, many of them are based on lies or at least stretch the truth to the max.
According to a post on Wikipedia about campaign advertising, "While there has been progress in regulating campaign finance, very little has been done in the way of regulating political advertising content. Candidates can and will display messages in their advertisements that come very close to propaganda. The Bipartisan Campaign Reform Act of 2002 addressed the issue of "soft money” or money contributed through political action committees, it raised the legal limits of hard money that could be raised for any candidate, and set limits on what funds could be spent on election broadcasts, but it did nothing to challenge the lack of truth in political campaign advertising. As of this time, there is no pending legislation addressing this issue."
In other words, people can say what they want and there is very little that anyone can do about it. So, no the ads won't change my mind.