Two more glitches/cheats that I have seen being used in ranked matches:
1. You can get on the rooftops of the central buildings in the "rue de whatever" level (the one with the 3 level building in the middle that you can climb on the roof, burning tank at one end), and it's pretty hard to get them
2. In Poisson, there are the two buildings at the edge of the map (Axis CTF flag base). If you look back towards the centre of the map and the building to the right of the fountain. There seems to be a glitch that you can look through the ground floor wall in the corner. I watched a guy just snipe the base in a match, and I wasn't able to shoot him through the wall. I was near the tank spawn point (near the hay bails). I unloaded 2 clips at him with the BAR with no kill. He bailed before I could get around the back of the building to see if he was vulnerable from the other side (behind).
Glitches are fun in player matches with friends.... But I hate ranked match cheaters!! Ruins it for everyone...
^ That may in fact have been 3 cents worth!!