I'm seeing a number of mod flags around links to abandonware sites like:
Should these "grey market" sites be allowed?
My opinion is to not link to those sites where not needed, but not remove if they clearly add to the question/answer.
I prefer "might be availble on abandonware sites" instead of "can be downloaded from http://www.abandonia.com"
Naturally, when the site in question is clearly hosting warez etc. it is clearly disallowed, and should be swiftly removed.
I really don't want that the new game site is blocked my corporate firewall because it links to porn/warez/hack site.
For me is ok link abandonware sites but they have to be rated good and safe by services like for example http://www.mywot.com/