1) Did anyone land on the moon?


Birds land on the moon, on a daily basis...


2) Did anyone place a flag on the moon?


No, this was a "false flag" operation...


3) Since 1969 has there been any other flags placed on the moon?


Yes, but all were eaten by hungry moonbirds. Especially the lunar owls are some greedy bastards.
They ate the lunar rovers way back in 1976.

Smaller ones, like the humming-moonbird, prefer footprints and Hasselblad cameras for lunch.