unprofessional people

基本解释

For most of us, the immediate response would be to simply leave the current site in favor of another one because both people and search engines consider broken links as unprofessional.
绝大多数人最直接的反应就是离开，去另外一个站点，因为无论用户还是搜索引擎都会把失效链接看作一种不专业的表现。
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In addition, avoid becoming a fan of potentially people or products, or taking online quizzes (for which there are no privacy controls) that could be deemed unprofessional.
另外，不要成为一个有争议的人的粉丝，或狂追某个产品，或参加在线测试，这些都会让别人觉得你不专业。

Some people and even organizations believe that smiley faces, winks and other symbols of digital emotion are unprofessional, undignified, and have no place outside of a high school hallway.
FORBES: Emotionally Intelligent Emailing