You would be crazy not to consider them. With my PSU team, I signed
Matt Brown from JuCo in OK (or NE). With just a couple coach calls, I realized he was above avg in both my O & D. That makes it a no-brainer, even at distance.
On the other hand, even with informing of redshirt, I've signed a few too many with my NCCU team recently. It can be tough to develop them and work them in to your rotation (unless they already know both your O&D).
One sneaky benefit of an ineligible going JuCo is that their HSGPA will be adjusted in line with their JuCo GPA. That can help. Even better, you can still throw effort and inform of redshirt and get an additional year of development. It can be risky, but if you're not battling, then I don't know why anyone wouldn't try it.