How to to deal with random source/destination/services that are appearing in the logs

I created general rules for our 3 environmetns eg. DEV, UAT & PROD, based on the fortigate logs. However am finding lots of random source/destination/services aswell. Whats the best way to deal with these? Create a DENY rule for each one?

Can I group them together some how? Thanks. ( Fortgate 6.0.2 VM64)