Re: How does Monster's crawler identify users?
This is a terrible thing to say.
First, there is no guarantee that I will not get aggregated with someone else if I stay opted in, and that can affect my career.
Second, opting out is as lame as it can be. It only gurds Monster from lawsuits. It does not help users at all.
We assume that all Monster users are aware of the fact that the data is being aggregated on them? So there are gazillion of the unaware Monster users, and additionally a big chunk of users who tailor their on-line postings for possible employers to see. Such as I can post programming articles to programming sites and log with my Linked In credencials for everyone to see.
There are also people without social media accounts (imagine that!), who will figure they need not bother to opt out as there is nothing to aggregate on them.
Third, what is the point of providing a service that is financially dangerous to use and then giving an opt out option?
Fourth, my original question about the method of identification has not been answered.