But 
would it decrease the flood of actual spying?
Since I know what your next answer is going to be Snail, I put in mine:
I'm starting not to care anymore either way, spy...do what ever one wants to. If they game the game and have cause to celebrate that, then I feel much sorrier for what their actual life must look/be like. However after even more evidence I've witnessed you're not going to ever convince me that it rarely happens (paraphrase of Snailman.)
Syping happens and will always happen, no matter what you will come up with.
But indeed it's far less frequent as it's commonly portraied. In fact, 90% of all "spy" claimns are just the usual knee jerk reactions by the usual morons looking for an easy blame. Examples are legion.
Just one of them
A few months ago, a player complained about his sunk player, claiming it could have only been for spies that the enemy Lanc came DIRECTLY at his boat. After a few questions it came clear that said player and his CV were right off an enemy base and had already taken down most of the town.
"BUT IT WASNT FLASHING". - Well, a lot of players are regularly checking remote coastal bases for any sneak CV attacks, something which has even gotten easier with .dt command.
Unfortunately. said player refused to belive that anyone on the other side could ever have such and idea. It was hilarious and sad at the same time. Once a player is on the "spiez" track, he will see them anyhwere. And it's so convenient
You should know the name of that player quite well ...
I could go on with actual examples for hours. RTB bombers drags enemy fighter over own CV. 15 minutes later enemy bombers come looking for that ship. Could the fighter pilot have radioed the position? NOOOOO - SPIIIIEZ
SB not firing because enemy ship not in firing arc! Never! It's spies! (Happened countless times to myself)
NOE was ruined because it flew directly through enemy CV dar, or gave itself away by darbar at takeoff or was just the next logical mission to happen (players are quite predictable)? NO WAY - SPIES!
I could go on for hours. I even was accused for spying by several players on several occasions for "finding" enemy multi bomber missions at 25k, slowly creeping across the map for 30 minutes.
It's always the same folks crying around several times a day each time something went bad.
And if someone was actually trying to spy, increasing switch time and even cutting cross country communication would help nothing at all. It just making things worse for everyone else.
