Upstream Proxy - Content Filtering

I currently use Family Shield for basic content filtering, but the Mikrotik has so much more options, that Im going to make use of an upstream proxy (web based HA on cloud).

I wondered what you all use for your content filtering - any suggestions, scripts, tips? I can also make use of the excellent write up regarding adverts using the same system so it seems the way to go.

bump. Anyone using a wan/cload squid based proxy service for content filtering? If so, can you provide any info on best pacakges to filter out know porn sites etc?