Mobile-device users are embracing ad-blocking software, suggesting that marketers who rely on intrusive advertising methods are likely to fall behind, writes James Harrison. Fortunately, there are plenty of tools -- such as opt-in SMS marketing and Big Data targeting -- to help brands create more relevant and appealing mobile campaigns. "Blanketing consumers with the same message will soon be a thing of the past. We are moving into an era where, if done correctly, no mobile marketing message should be unwelcome," Harrison writes.