I'd like to get opinions on whether or not you think it is more likely to have a site de-indexed if you have submitted, authenticated and added a sitemap in Google Webmaster Tools vs. doing nothing and just letting Google find the site itself. I have built one new site, and haven't touched GWT, and it was indexed in just a few days, and has page rank of 0 (which is fine...it's still indexed).
Their de-indexing is BEYOND frustrating, mostly because they won't let you know exactly what went wrong.
For instance, my site, bargainviolins.com was de-indexed within a week after building, submitting to GWT and authenticating, etc. and I have a lot of unique content on it. however take a look at violinsforsale.co.cc (not my site) NO CONTENT, not even a word, no customization at all, it's even on a free subdomain site, and it has been ranked and indexed on google for months.
I just don't get it. Just when you think you have a few things that work for SEO with Google, they throw in a wrench like this and make me wonder why I even try!
Thanks for any input everyone!