ikegami has it. They're blocking agents and returning an incorrect error. Specifying the agent name makes the error go away-

cow@moo[99]>perl -MWWW::Mechanize
my $mech = WWW::Mechanize->new();
$mech->get('http://www.warez-bb.org/login.php');
Error GETing http://www.warez-bb.org/login.php: Requested Range Not Sa
+tisfiable at - line 2
cow@moo[100]>perl -MWWW::Mechanize
my $mech = WWW::Mechanize->new(agent => "GEADtruancyBot/3.14");
$mech->get('http://www.warez-bb.org/login.php');
[download]

Side-note: friends don't let friends use warez. (update: typo/rephrase.)