It's a toy and I bet it was done before a million times. Jack promoted it, so now there's some 100 users but spam already arrived as was to be expected, too. If they would stop improving it now, the project would die within a week.

You do realize that messages are plain text public? And people read and write to whatever channel is busy but only to channels that are far from their actual street address to not dox themselves just in case? That won't change unless we improve the project.