The game isn't new anymore, and people have their linkshells and FCs. There's really no need to shout out to strangers.
Although, shouts do still happen... was in Cortheas yesterday to do a leve for my animus quest, and someone shouted about needing help with the Four Winds FATE, so I hopped on my choco and rode out there. A handful of other players did the same, and we took down the FATE with about a minute on the clock... at which point we all thanked each other and went about on our ways.
So, yeah, there is some productivity in shouting, but your best bet is to find a good linkshell... then, getting to know people in linkshells will help you find a good (and fitting) Free Company.
If you do need to shout though, just go to Revenant's Toll or any city's market districts. You'll always find lots of people during primetime hours. They're just not talking in /shout like they were at launch.... which I'm VERY happy about. Personally, I miss the old days of XI, when talking in /shout was considered rude.
Edited, Jun 1st 2014 9:41am by Thayos
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Thayos Redblade
Jormungandr
Hyperion