Great idea. Especially if the number is spoofed and you end up harassing an innocent party. Then in either case, you reveal your e mail address. That way the innocent party has evidence of the harassment, and even if it was a scammer, then they can use the e mail address to spam the heck out of you.
I am not harassing the number like it is harassing me. I checked VoIP and with my telco & the number is not spoofed. You have a point & but some of us know what we're doing. The person at the number could have replied to my friendly inquiry asking them if they are calling me and why they are calling me & many other people and hanging up. I use an anonymous email that they can spam all they want.
If this is someone abusing their wireless number then this is one way of giving some of it back to them & confronting clear abuse in an environment that most of the time offers no recourse for the numerous & constant harassing calls that are occurring.