I own several domains. Many of them have a catch-all mail setup such that things sent to firstname.lastname@example.org arrive in my inbox.
One domain in particular generates a lot of strange email for me. It seems that some other domain or domains are sufficiently similar such that people often mistype their email addresses, and wackiness ensues. For instance, somebody of the username "mhamilton" bought stuff at L.L. Bean, so now I get their electronic newsletter. Someone named Beasley is getting married, so his or her lawyer mailed me the draft prenup. Et cetera, et cetera, et cetera.