Virgin Media are clearly setting adult filters and blocking sites, without the customer's authority. I know this because, two days ago, I lost all access to Playstation services, across all devices, but ONLY on my home network. After some research, I saw that others had similar issues and it was suggested that there may be child filters enabled on certain sites.
To test this theory, I tried to access other sites of an adult nature and sure enough, I can't access them either. I went onto Websafe, no filters were active and no sites were listed in the "Blocked" list. I added Playstation Store to the "Allowed" list, switched on the filter and it still won't allow me access. Therefore, I can only conclude that VM are doing this of their own accord. I have reported the issue and am currently waiting on someone from IT contacting me.
A Playstation Plus subscription is not inexpensive and this loss of access is infuriating. It would be good if they would stop making people's decisions for them. Not good customer service, VM.
[Update] After switching off the child filter again, I can now access "adult sites", but still can't access Playstation services. Weird!!!