The Aviation Herald is normally quite good at reporting these things but I accept that (a) not sure airlines in that part of the world would admit these incidents happen and (b) it is not a good idea to get up during take off or in the few seconds before/after landing.

Once off the runway and taking slowly I am not sure it makes a big difference, even if hard braking happens (same as if you are standing in a bus in town), but I agree it is quite pointless as there is nowhere to go until the doors are open.