Yeah best this does is teach them some new tricks for sneaking around whatever barriers. There’s a reason noone bothers with parental control settings as is.

IMO this is the same issue as pollution or banning carcinogenic compounds. If you all agree it’s harmful to society you need to ban it at the manufacturing level. It’s not inherent that browsing the internet has a negative impact, it’s that these individual tech companies have purposely designed their products to extract value from kids even with clear evidence the design is harmful to them. Companies with bad faith products like this (looking at you oil and tobacco) should be forcefully shut down (and prevented from reforming) based on their demonstrable malicious intent (holding back research that their products are harmful).

Edit: tl;dr you should ban harmful things at the manufacturing level not try to moderate them at the end point