There seems to a little bit of extreme hysteria from non professional pilots posting in here, certainly another case for a "pilot only forum" to discuss incidents like this. May be best if they stick to the SLF forum.
Security007
To answer your questions regarding the de-ice system, it is extremely unlikely that ice could build up in the system, there are 2 automatic drain valves to drain moisture away. Also the 6 dual distribution valves are heated via 28VDC. Alot of dedundancy is present even in the de-ice system.
Scudrunner08 post #399
This has been discussed earlier, the Ref Switch increases the Alpha protection by 20kts