Agreement with filters being mostly useless...
... unless you have an IT staff that constantly monitors it and keeps on top of the filtering configuration.
Granted, the one I'm in charge of is at $work; it's partly to keep the amount of pink off the monitors, but also to block failbook and other social media sites from the masses to keep productivity at acceptable rates. Finally, it also acts as a reasonable malware blocker.
Ironicly, the one they put in charge of the nanny filter is the one who is opposed to censorship on almost a religious level; but I understand and accept the business's reasons for it.