ur use case is valid, but not that which lemmy is designed for, an i doubt stricter rules would be possible, and seriously doubt that u could make lemmy into something like that.
my opinion is that what ur after is a custom website that collates unixporn posts (with op permission) like a booru or something similar, which has a more robust tagging and sorting system.
imo unixporn is not a shopping catalogue like u want it to be, it is a anarchist art gallery where people come to share and see setups
i hopes u hav a cosy sleepytimes !!