That is indeed a good point. However it won't prevent the ideas of hijacking little league sites that your employees may visit which would be maintained by one

That is indeed a good point. However it won't prevent the ideas of hijacking little league sites that your employees may visit which would be maintained by one web designer one day a year, on that employee's home computer, which then goes on to use it as a vector to attack the company. Yeah. Technology to hack someone is getting better by the minute.