Yeah I can't say I was thrilled to be getting killed like that. Reminds me of why I don't play games like Ark, Tarkov, etc.

If you already have it, just flip off friendly fire in the options. It pretty much kills the PK aspect of the game.

I mean, players can grief, but it's pretty limited.

Aside from some "safe" areas on the map, a player can drop a nuke on an area. You don't want to be in an area when one goes, but you have plenty of warning to move. Late-game, nuked areas are mostly desirable, as enemies and plants there have more stuff, and it's the only way to induce certain multiplayer events, but if you can't deal with radiation yet, it can be a pain. Nukes are virtually always used to induce one of several multiplayer events, though, so unless you have a CAMP right in one of those areas, it's rare to encounter nukes.

They can use a vending machine at a train station or city, and only one person can be using one at once. Same thing for player vending machines in CAMPs, where a player can sell off stuff to anyone who wants to buy it.

They could stand in a doorway, but fast travel generally makes that a non-issue.

They can use obnoxious weapons that generate a lot of explosions in a multiplayer event, which makes it hard to see; there was a while when some new weapons were able to do that. I don't think that that's currently an issue.

If they're too powerful, they can kill certain multiplayer event bosses so quickly that other players don't have time to do enough damage to "count" as having killed them. Optimal play is to slightly damage low-level enemies, which gives someone full experience when they die and lets other players have a chance at also damaging them. For a few bosses, there's a minimum amount of damage required; optimal play is to get your damage in and then go off and be doing other things in the event.

I guess maybe someone could manage to drag an aggroed enemy somewhere on the map.

Sometimes people don't bother to try to complete some events, just want to kill enemies for experience. That's not really bad per se, but doesn't help complete the event for people who are interested in that.

Certain game-mechanic-exploiting builds can be affected by other players sharing certain perks. Like, some players use a build where they intentionally suffer almost the maximum amount of radiation damage such that they have a very low cap on their health. This makes them fragile, but with the right perks, can provide enormous benefits. Another player on a team can share a perk that cures radiation damage over time, which cures them but causes the benefits to go away. People doing that tend to get kicked off teams.

Some people try to create "trap CAMPs" that cause a visiting player to die one way or another. Like, maybe they have a door that opens directly off a cliff or something. Bethesda normally fixes mechanisms that people figure out, and the penalty for death is pretty minimal anyway -- just need to go back to pick up any scrap that you were carrying.

I dunno. I really haven't seen much by way of griefing. Most of what people do is use items that give buffs to themselves and nearby players for some time. They usually wait until a multiplayer event and then activate them. That's a positive. People have been pretty nice, in my experience. But, then, I've almost always had friendly fire off.