Vodafone is now blocking Facebook in a stealthy manner:
Tracing route to facebook.com [173.252.120.6] over a maximum of 30 hops:
1 1207 ms 359 ms 369 ms 10.174.30.73
2 2011 ms 349 ms 360 ms 10.166.30.34
3 * * * Request timed out.
4 326 ms 369 ms 339 ms 10.166.30.20
5 * * * Request timed out.
6 * * * Request timed out.
7 * * * Request timed out.
8 * * * Request timed out.
Tracing route to facebook.com [173.252.120.6] over a maximum of 30 hops:
1 1207 ms 359 ms 369 ms 10.174.30.73
2 2011 ms 349 ms 360 ms 10.166.30.34
3 * * * Request timed out.
4 326 ms 369 ms 339 ms 10.166.30.20
5 * * * Request timed out.
6 * * * Request timed out.
7 * * * Request timed out.
8 * * * Request timed out.