What are the main rules of thumb about fair use on the web?

The number one piece of advice: Assume it’s protected.

I'll give you other tips below for you:

Just because its online, doesn't mean that it’s public property. So many people have this false sense of entitlement to anything they see posted on social media "especially pictures".

The number one piece of advice: Assume it’s protected.

I'll give you other tips below for you:

Just because its online, doesn't mean that it’s public property. So many people have this false sense of entitlement to anything they see posted on social media "especially pictures".