ct. Yankee
Great you made it. That doesn't mean it wasn't dangerous.
I have flown CRJ 50 & 70 for years now & your right, normally there are no problems when phones are left on but there HAVE been problems.
We've had radio comms interference and even a spurious cargo fire indication (with obligatory diversion & evacuation which caused a/c damage & could easily ended up with people being hurt). Officially attributed to mobile phone signals.
You just don't know what might be affected what the consequences may be therefore it makes sense to take the variable out of the loop & ban their use on A/C.
Can't understand why anybody would argue with this, it's a safety issue.