Re: "...hashland would sound silly."
And as a counterpoint to the Octothorpe which survived because it was on typewriters, here's the history of a punctiob mark that whilst recognised by Webster's hasn't been widely adopted. The interrobang, a cross between a question mark and an exclamation mark. Curiously, it was offered by Corona typewriters as an optional upgrade.
https://99percentinvisible.org/episode/interrobang/
Biting the hand that feeds IT
