You can still do things like check the history.
Tall to your kids
Make sure nothing You say or do gives the wrong message
If you have concerns switch to the old style phones . Ones that have no internet access .
Minimum data contracts
Turn off the Wi-Fi when no one's home they can use the library computers at school.
Make sure your kids know they can tell you anything so they feel they can tell you of they think their friemds are looking at unsuitable stuff.
I'm undecided on how influential some of this stuff is . It may not Have been internet when I was at school but there has always been access to porn. Porn was practically currency at school. Every secret hide out in the woods was littered with porn mags.
Most of us sneaked downstairs and were exposed to things we shoudnt be . I used to sneakily watch horror films I grew up still knowing not to attack people with kitchen knives and chainsaws.
I do think to an extent that if your child is so influenced by watching stuff there is kimda a problem there anyway.
I wonder if the behaviour wasnt excused from toddlerhood. Described as boisterous or "just being friendly " etc , I wonder if all other messages around them were changed, whether porn would have the same effect on them.
I do believe it has an effect obviously what i mean is, if we truly did all we could with everything else whether it would have the hold over them that it does now.