When job searching, I update my resume on a few job sites. On three occasions, I've noticed the behavior of my boss and a few others changing (them being nicer to me) when I've posted my resume. I also get calls from recruiters, and sometimes I've felt certain such calls were not from someone who genuinely wanted to recruit me, but wanted to find out whether I was job searching or why I was leaving my current job. I started saving such phone numbers and have received calls from them at least once more (even after I deactivated my profile from the job site where they said they saw my resume).
Do companies do this? Do or can they have someone from a recruitment firm inform them if an employee has updated their resume and is actively job searching?
I know job sites have features to block certain employers, but even though I've done that, they seem to know. Perhaps because the recruitment is managed by a third party headhunting firm. If companies do have people who inform them in this manner, is there any way I can prevent them from finding out?
Perhaps another way to ask the question would be: "How can I know whether the company monitors employee job searches and through which firm or job board they do it?".