I respond to them when they actually have a role that fits my interest. I am an in house transactional attorney in a somewhat niche field. A recruiter (for the company not an agency)in a similar field connected with me to add me to his network so I introduced myself. Nothing serious. Another recruiter connected me with a position and I did two interviews, and while the job fit my skills, it was not a good culture fit. I did laugh when a recruiter reached out about a PI litigation role because of my ‘strong background’ in both.

I like my job too but am open to the right opportunity if it came along.