JW411
I would consider such advice to be a serious flight safety hazard
Couldn't agree more - now that airline SOPs have an ever increasing amount of standard calls, which must be strictly adhered to, they are increasingly blotting out ATC calls as we seem to talk continuously from 10-15,000'. Add 121.5 in Europe and it is a serious distraction.
This problem increases despite the current push for ensuring less distraction in the cockpit in the descent and approach (ban on sipping water being discussed in EASA land)
One thing's for sure - miss an ATC call which leads to an incident, through listening out to the chat on 121.5, and you'll even find the Spanish authorities completely changing their "recommendation" and you'll be toasted.