Handing out 'nice' FTP sites is usually prohibited in the forum:
-Official publisher's sites with patches/demos
are allowed.
-Scene distro's (hacked PCs with user/password) shouldn't be in the public domain, and will therefore not be tolerated. It's considered link-stealing.
-'Tagged' public FTP's would only be allowed if you tagged & uploaded the files yourself, and if you can prove the server's administrator is OK with it. Note that this implies some good knowledge of the scene, and whenever someone knows his stuff, they'll think twice about posting that kind of information here.
So, all in all. I guess the short answer is
don't expect anyone posting those links, unless they want to risk a ban.