Wow, I didn’t realized that…
Because Gmail doesn’t recognize dots as characters within usernames, adding or removing dots from a Gmail address won’t change the actual destination address. Messages sent to yourusername@gmail.com, your.username@gmail.com and y.o.u.r.u.s.e.r.n.a.m.e@gmail.com are all delivered to your inbox, and only yours.
Nice, I guess.