i am running my Mikrotik with altered, but since everyone is having its own rules, i was thinking to create a thread and post good firewall setups and rules to block bogus/malicious IPs.
So everyone could be helped from this and get an idea.
Everyone's situation is unique, there is no one size fits all.
The default rules are safe out of the box and one should only modify these when one understands how the rules work and how packet flow works on the router.
Finally, one should avoid 90% of the garbage on youtube.