Stockinette or no?

[elfhelm]

Hey everyone, I'm just about to start my very first project but I had a few questions that I need answered first.

I plan to use this scarf pattern to make a wizard!scarf using circular needles. I haven't chosen a yarn yet, but I get the feeling that I'll end up with acrylic.

I've been researching for a few days and found this great site which helped me understand things much better. The problem I'm facing is that I keep hearing how stockinette will curl and that blocking is useless on acrylic. If I use this yarn, will my scarf be doomed? And without blocking, will the scarf be able to hold its shape (i.e. not become tubular in the center, away from the closed ends)?

Thanks in advance!