[Mordisquitos]

> echo - ok for all ages.

> cat - 18+, prints the porn you found directly to your terminal.

Sound good in theory, until you realise that any teenager knows perfectly well how to trivially get around the lack of `cat` to read their terminal smut:

    $ while read -r LINE; do echo $LINE; done <my_porn_file.sext

[sk5t]

Simply require per-use parental consent for fopen.

[noisy_boy]

I am sick and tired of these teenagers and their sharing of bash oneliners on insta.

[LoganDark]

Obviously the solution is to ban their use of all social media so those pesky bash oneliners can't be shared in the first place!

[RGamma]

cat ~= rev | rev. Are all isomorphisms also 18+? Does it spread to | or rev?