Flying in Baltic Europe is a hot-spot for SLF thinking that main wheel touchdown is an indication to unbuckle and start retrieving overhead luggage - in one case I can remember while positioning out of RIX, all before the nose wheel was down.
When I am at the pointy end and hear the "remain seated" rant for the 3rd time, the temptation to cause an abrupt halt from 30kts to 0 in the space of a couple of seconds is so high as to be almost impossible to contain....... One day, and they won't do it again
RIX