Shell footgun. The || only looks at the return value of the preceding command, rm -fr /. There’s an edge case of the command returning a non-zero error code triggering the statement intended to run if, and only if, the condition is false.
[ 0 -eq 0 ] && { echo "I am in your PCs, deleting your p0rn"; false; } || echo "Lucky you?"
Use if clauses, people. These test abuses do not make one look extra-smart.
On an unrelated note, I lost on the first try.
Don’t do it! It’s a set-up!