Should the internet be filtered?   stance: no:
Filtered, no. Standardized, yes.
There should be domain extensions (y'know the .com, .net, .org, ...) that are specific to "unsavory" industries. So, porn sites should all be required to use a .xxx extension so that a router can be programmed to block all incoming connections from a .xxx site. This way parents can block a whole group of sites by blocking domain extensions.