I don't think that it would be a problem if one player just stands there and throws ammo or health packs. I mean yes, of course those kind of players do not contribute to the team but sometimes it's not worth it to pay attention to such minor things. I agree if more people do this it can be really annoing so a !warn and !put afterwards might be appropriate but not anything else. On the other hand you could scare newbies away and they might just leave the game.... you don't have to expect that players do something for the objective as it is just supposed to be fun for them.