Don't worry. This is not a real MP cheat but it's interesting.
Playing an MP game and want to make it appear to the other team that you've tripled or quadrupled the number of troops on your side?
If you're playing in an MP mission where you eject from the back of a helicopter, OFP player Titanium says you can convey this effect by issuing the EJECT command a number of successive times as fast as you can. This effect can happen because of because of lag or desync in an online gaming environment - even with a good connection.
The results are the appearance of a lot more troops parachuting down. However, when all the chutes hit the ground, what counts is the actual number of players on your side. Those other phony shoots are not but just that - phonies.