Those are fortunately pretty rare behaviors. They call for a degree of sociopathy rather than merely buffoonish incompetence.
An unfortunately common story I hear from acquaintances who have used recruiters in my industry is that many recruiters will use a shotgun approach and feed lines of bullshit to prospective employee and employer alike. The recruiter might take your resume, massage it to hit all the right notes for a wide range of listed positions, and then submit it. That will probably garner a few phone interviews and on-site visits at the very least. Once the candidate gets on the phone or on site, he and the people he's interviewing with will soon realize he's being tested for an entirely inappropriate position for his skill set. Not only is this a waste of time for everyone involved, but it permanently damages the candidate's reputation with that company and the people involved in the interviewing.
An unfortunately common story I hear from acquaintances who have used recruiters in my industry is that many recruiters will use a shotgun approach and feed lines of bullshit to prospective employee and employer alike. The recruiter might take your resume, massage it to hit all the right notes for a wide range of listed positions, and then submit it. That will probably garner a few phone interviews and on-site visits at the very least. Once the candidate gets on the phone or on site, he and the people he's interviewing with will soon realize he's being tested for an entirely inappropriate position for his skill set. Not only is this a waste of time for everyone involved, but it permanently damages the candidate's reputation with that company and the people involved in the interviewing.