What do you mean without spaces?

And sure, I'd say it's ok, but probably depends on the context... casual, work, something serious, etc

Casual, and work (interviews too) Here's an example: >Can we meet for lunch at 0900? Sure, where do you want to go? >Why is the sky blue? Unsure. Thanks, b8

Doyoureallymeanwithoutspaces?

vertically, yes.