Do visiting spiders have significance?

I am trying to untangle a problem, and need some advice. Have a client that was doing some bad stuff in the past, but cleaned up its act (a couple of doorways). The pages have been gone for awhile now, but the site disappeared from Google last month, and assuming the dance is finished, didn't come back this month. Their site was down at the end of December so I thought that might have caused the problem. They also had a low page rank (2/10) due to programming . I'm guessing now that the PR was the cause, but the Google spiders are still visiting everyday. If someone had reported them for the doorways and they were removed, would the spiders still be coming to the main URL?

Thanks,
J-net

My guess is that this site has been manually removed and that the spiders would still visit, simply following existing links to the site.

Gringo.