From Scrapper's Blog (fubar.com/blog/57/670407)
"Contrary to popular belief, you will NOT get reset if you and your spouse share a computer. The rumors are false...you can't believe everything you hear!"
(read further, there.)
(You may also want to have a look at other blog posts - another reason for reset, if memory serves, includes use of a photo not your own as your profile photo if you are in the top 100 (scores or members, not clear on that- I'm not, anyway.))