Yeah, but they really don't look as good. You could spend some time messing around and making really nice icicles, or you could spend a little and get on with it.
These are 6.5 euros a sprue, and two is about all you'd need for a 3x3 or 4x4 ruins layout.
I mean, how many spots do you have on your terrain where you could stick an icicle?
But to each his own. I posted this info in case anyone else was looking.