One tried to be clever by claiming that they were calling me to respond to my inquiry. I guess it might have worked if I was looking, but it just made me mad and I told them I hadn't and to never contact me again.
I think my favourite, though, was a recruiter who emailed my husband twice on the same day, for two different positions in practically different fields (same company, both technical roles) saying that his background was "perfect" for both. Slightly better than the time that (same company, possibly different recruiter, they have an army) emailed both of us for the same role saying each of us was perfect.
He's a web dev with enterprise services experience. I build apps for head-mounted devices. There's no way we should be close to perfect for the same job unless the only requirement is having a pulse.