base64 encoded pictures

Avast Free Antivirus / Premium Security
1

Is it possible to block base64 encoded pictures? I am looking to block all of them.

data:image/png;base64

Thanks

2
I am looking to block all of them.
Why ?
3

Porn

4

I dont think you can block by filetype.
Why not block the URLs instead, that is how it is usually done

If you use Norton DNS then there is a porn block >> https://connectsafe.norton.com/

Or OpenDNS >> https://www.opendns.com/home-internet-security/