Did you deactivate on purpose? Unless you still use Messenger or are considering changing your mind, you should delete your account instead. Deactivation just flips a bit; deletion actually removes your data.
Reminds me of of emoji almost. Ambiguous, short on vocabulary, but you can get ideas across. An advantage over Toki Pona is that everyone already "speaks" it, but I assume TP has more in terms of linguistic structure