The landmine and the grenades dont work as intended, they are very unreliable.
I just used an hour luring a guy who tried to KoS me into a building where I had set up a landmine, and when he finally runs over it nothing happens and then I got killed because I ran into the room expecting him to be dead (which he was not, d'ooh).
I talked to the guy afterwards, and he said that he took _no damage_ from it all all (and he was in the upper red when he walked over it because I already tagged him up).
Walking over a landmine should be certain death and not a lottery-gamble.
I also dropped a un-pinned grenade at my own feet some weeks ago (because im a fool lol) and the only thing that happened when it exploded with me still standing on top of it was that my boots got ruined and my pants badly damaged - but I took little to no damage (I was still in the white, but it was going down for some seconds).
Please fix it, right now landmines and grenades can not be relied on at all.
Also - the flash grenade is known to kill people from time to time which should not happen either (I dont think so anyway, you guys be the judge on that).