Because in this game, when people grief, players will get mad easily. And most of the time they will kick you for it. Here a couple of examples.
Example 1: placing proximity mines wrong.
Example 2: stealing vehicles.
Example 3: destroying friendly vehicles.
Example 4: killing enemies from a glitchy spot.
Example 5: swearing/cursing in chat.
Example 6: exploiting in general. (killing sbh's, getting out of the map, shooting at stanks, placing beacons on unreachable places)
Example 7: doing absolutely nothing.
Example 8: surveys, votekicking, map change surveys, etc.
Example 9: acusing people of hacking.
Example 10: acusing people of something in general.
1. The reason for people getting kicked for improper mine placement is very clear. There IS a MINELIMT. Mines need to be placed in certain locations as this has issue has been discussed before.
2. Vehicle stealing should not be an issue anymore but it still is. If a teammate steal YOUR tank (Your HUD will say it is yours) all you have to do is press "L." "L" locks the vehicle kicking the thief out of the driver position even if your out of the vehicle. However the passenger seat could be a problem if you want someone to get in.
3. I hadn't seen any problem with destroying friendly vehicles.
4. Again, hadn't seen much of this.
5. Swearing and cursing?? Who doesn't do that? Its only a problem because players will get into an argument and create excessive swearing that causes uneasiness among other players.
6. From your examples "getting out of map" and "beacons in unreachable places" is a big NO. You should be kicked for doing such things repeatedly. Any exploits that the server agrees that should not be allowed are called rules, therefor you must follow them.
7. AFK is a kick because you are taking a valuable player position. If your just walking around doing nothing, you need to be kicked because what's the difference of being afk? You take bullets and die a lot that's very helpful.
8. Not much people do this and I haven't seen much of this lately.
9. Lots of people accuse others of hacking. Lots of times they are wrong. First accusations, ok, mods will look into it or not, depending on the accused. Continued accusations which leads to example 5, kicked. Its like disturbing the peace, shut up or force removal.
10. Accusations in general, again its the repeated accusations that make people mad. Once, its ok, ten times, you need to shut up and cool down.