On a recent flight to SIN on LH, I was in J travelling on the same flight as a family member who was in F. After my meal service, I decided go up to the upper-deck to visit my family member in F.
LH usualy has a metal barrier to prevent people entering the F cabin, but on this flight it wasn't in use. Normally I would have introduced myself to the cabin crew and asked if I could visit my family member, but as they were quite busy in the galley, I decided to just walk past.
After I had made my way half-way across the F-cabin, one of the LH matrons lunged towards me, claiming I looked like I was making a mad-dash for the cockpit. In the end she allowed me to continue, but claimed that they treated all guests to the F cabin as a security risk.
