Today when I was being farmed by Carl4D for 2 points at a time, I was unfortunately cursed through the wall in the area you can get a space health capsule. He cast it, while imprisoned, mind you, from the loft near where the OTHER space health capsule is, where there is NO line of site or even a beacon can be seen. In testing myself, you can cast any non projectile spell there, including prison, green gas cloud, spikes, and curse.
The fact that these players know about these glitches and can exploit them ftw is infuriating. Almost as bad as shooting at the feet with lightning or demi (which still happens and I still attempt to crouch down and block it before it magically floats through me thankfully).