Automatic removal from the map is not a bad idea actually. If you sit there doing nothing for too long you're gone.

But handling the situation is a double edged sword. It could be open to abuse by some players reporting others who are actually doing something simply because they think the player sucks thus giving them a penalty when they didn't do anything wrong. And with my experiences in GW1 if players who do the right thing and report only people who are in fact not helping and just sitting there and get penalized themselves it would nullify the whole system and nobody would report leechers out for fear of being punished for reporting.

In the end the system would do no good if players who do nothing wrong are being punished. Leechers will leech knowing nobody will report them and players who play will just put up with it so they don't get in trouble themselves.

We also have to take into consideration bugs in the game. Example: the day before the Feb. 21 patch, I was in Infected: The Conduit Elite. 1 player on the team told another player he reported him. I assumed it was because the player sat there the whole time leeching. The player who was apparently reported responding to the player who said he reported him, saying he couldn't do anything because he couldn't assign bridge officers to any ship stations due to the bug that was fixed the next day. I could understand but the player could have said something ahead of time. I was going toward the player so I could report him myself for leeching but after he responded and explained why I couldn't bring myself to report him. I actually felt sorry for him and hope he was never punished, or if he was, after explaining the problem his punishment reversed.

I think about the best bet is to have an automatic removal from the map type system if you're sitting there for 5 minutes not doing anything. But lag could cause a player to appear to be AFK for a couple minutes or so depending on how bad it is. And also the player could move just a little every minute or two to prevent being idle so it would need to take into account whether or not the player
#1 attacked something
#2 used a supportive skill on another player such as transfer shield strength (sitting there using only skills on yourself wouldn't count as being "active")

There is no surefire way to do something about the jerks who enter and don't help all so they can reap rewards with no effort without having collateral damage of some kind. I think the best we can do is add some kind of system and then give feedback and the developers can make adjustments accordingly to reduce collateral damage and the system is at least tolerable to most players.

In my experience I hardly ever see any leechers in fleet actions and STFs, but that's probably because I'm too busy trying to complete the mission to notice them. I admit I'm a coward. Ill hit evasive maneuvers and get out of attack range to keep myself from dying so I don't have my team waiting for 60 seconds for me to respawn. Since I try to die as little as possible that could be it. I'm not respawning at the starting point of the map where another team member is sitting there.