UniFi Network - Notify when user on network visit certain websites?

Hi! I have a Unifi Dream Router, and would like to be able to get a notification if my son enters some dangerous websites on his computer. Is this a function that is possible? Thanks in advance.

PS. I don’t want any comments on what is right or wrong, monitoring your son. This is because of personal issues, and is just because of love and care.

/Juno

Maybe pihole or similar tools can help you with that, don’t think you can get that detail from unifi atm