You can make your posts look like this...

[00100001]

Did I miss a memo?
Did you miss the memo??

Oh is this is really really fun lol

This?

Second try.  Thanks for tips!

Woohoo! 🤩

Thanks for showing!!!!

ok I'll bite

Helloo

My new favourite way to send messages!!! 😁

 But why? And how did you notice this? I’m fascinated 😄

But why?

You have to press enter after the 3 squiggles

(*)
Like what?

Third time lucky

Ooh fancy

bite me on the bum

How random!

How did you discover this OP?

Oh I was using the three ~ to make a gap in another post. Something like ~~ 3 hours later ~~

How did you find this out? 
This makes me wonder what other wizardry can be done!

That's super cool lol