Yep. That person / company gives domainers a bad name. I've been getting tons of them from him recently - all are domains that I own but have an "s" at the end (even ones that end in an s), a different TLD, etc..
All these domains are worthless (the ones I own) but are being used for some sort of entity.
IMO legal cybersquatting since there is no TM on the names - nor does he own the names when he sends them out. Highly unethical IMO.