This is a premature post. PIE routers are dropping packets destined to any of the various IPs youtube.com is living on. The following are two traceroute dumps that show packets destined to youtube.com abruptly disappearing after touching PIE routers.
From behind NTC link:
1 202-83-175-145.reverse.ntc.net.pk (202.83.175.145) 1.193 ms 1.172 ms 1.338 ms
2 khi77.pie.net.pk (221.120.192.105) 19.050 ms khi77.pie.net.pk (221.120.192.101) 30.789 ms 18.679 ms
3 192.168.9.2 (192.168.9.2) 10.169 ms !H * 34.435 ms !H
From behind PTCL DSL link at home:
1 192.168.1.1 (192.168.1.1) 0.540 ms 0.432 ms 0.472 ms
2 116.71.0.1 (116.71.0.1) 30.967 ms 35.191 ms 29.968 ms
3 203.99.170.98 (203.99.170.98) 26.720 ms 25.927 ms 25.967 ms
4 khi77.pie.net.pk (202.125.128.134) 26.219 ms !H * 26.785 ms !H
As best as I can tell, PIE is regulated by PTA. The bans lashed over blogger.com earlier were enforced at PIE routers as well.
This is an interesting debate on SlashDot.org about the apparently nine hundred Danish websites that have been defaced.