[Shinogana]

This won't take care of everything you asked, but it is a start.

[link=http://www.steambans.com/ban.php]http://www.steambans.com/ban.php[/link]

It is only a list of those steam id's banned by steambans, but that is still 13402 steamids.

You can also do a general search engine inquiry to see if the steam id is mentioned in any forums anywhere.