Silly question: how do I know if a film has been used? : r/AnalogCommunity

Looking for interesting use cases for 800 ISO film. I got this

When people say that you can't do Macro on film, what do they mean

what are the community thoughts on digital film rolls? : r

I did the silly, gimmick-y, thing, and bought the discount store plastic

Check your Walmart : r/AnalogCommunity

20 years wasted : r/AnalogCommunity

Anyone know what is going on? I received this roll of film and I

Check your Walmart : r/AnalogCommunity

I think I'm too stupid to rewind properly : r/AnalogCommunity

How much film do you bring on vacation? : r/AnalogCommunity