As someone who owns {commonFirstName}{commonLastName}@gmail.com, I _hate_ services that don't require you to validate the e-mail address you sign up with. And there's a special place in hell reserved for people who write services which don't validate the e-mail you sign up with, but do require you to sign in with your credentials in order to unsubscribe.
lol@gmail.com whoever owns this, hates their life.
Unfortunately no one can own that :) Google doesn't allow email id with less than 5 chars (to mitigate random spamming)