I have carried my B and K many times going through different Europe countries (France and Italy included) as well as Asia and US. I have never been stopped once but I have heard stories of people being asked about their designer items. So I think the checks are really random.
Yeah agree I think pretty random but I imagine more frequent during the tourist season in the cities with the most counterfeited luxury goods like Paris and Rome?
I actually don't see the big deal if and when somebody is asked if the bag you're carrying is counterfeit. If you're caring an authentic Hermes (or designer) bag why worry or be insulted? Someone is just doing their job.
Just say "sure go ahead and check", then move on.
In this day and age of heightened security and concerns about counterfeited goods, I do believe any traveler should never ever challenge authority in any airport in any country. The consequences could be serious and long term.
Back to topic. If birkins and kellys are my favorite H bags for traveling for work, I love the lindy when traveling with kids, followed by a birkin 40.
Tried my jypsiere for traveling with kids - way too cumbersome, never again!