Just wait until they find your wife's phone number. (OK, this wasn't datadog, but some similarly aggressive headhunting agency went from calling me to calling my wife - who is in no way affiliated with my company - to ask her if she could tell me about how they could help me in hiring, yadda yadda.)
I had something similar happen with a Facebook recruiter. I didn't reply to her first two emails so she started emailing my mom to try to get in touch with me. My mom called me because she thought it was a phishing email. I had never had that happen before.
I have started invoicing companies for wasting my time and also threatening them with CAN-SPAM complaints for failing to include an opt-out, an actual mailing address, etc.
Then, when my invoice isn’t paid, I threaten collections on them personally and the company. Usually that solves it. Then I’m “such a dick” but highly effective in recovering my time.
Back in the days when this kind of thing happened on the telephone, the SERIOUSLY passive aggressive trick was to talk to them, and then hang up on yourself. Repeatedly.
"Hi this is Arnie from CHewemup'n'Spitemout Staffing, is this Bob?"
"Hey Arnie, what perfect timing! I just started looking for a new opportunity, and I'm really excited to— CLICK."
Ring ring.
"This is Arnie, we seem to have been cut off."
"Oh Arnie, right, thought you hung up on me."
"No, not me, must be a bad connection. You were saying?"
"Yes, I was saying this is a great time to talk about opportunities. I just finished a major Java Enterprise JavaBeans project, and I'm— CLICK."
Lather, rinse, repeat, as the meme used to go before we called them memes.
oh man, that's great-- you could probably get through a LOTT more CLICKs before they get the point. what a great use of human psychology-- they assume you have good intentions because you called them... it's a bit devious, but i'm gonna have to add that one to the toolbox hahaha.