Alex, you couldn't possibly be any stranger than some of the people here!
"Stranger" means you've made fewer than 25 posts. Titles change at certain landmark numbers of posts. 25, 50, 100, 200, 400--uh oh--700, I think. For details, see any of the
Graduation threads in Miscellany, or Board Adjectives in
Info. and Announcements, I think.