This.
There will never be silent join for Premium members. There is no sense of having it. If you are a important person, for example a active YouTuber with a influence on the community, you will receive a VIP rank, which has silent join to prevent people noticing them joining the game.
As stated above, I don't think you are getting targeted, only killed by people taking your chest-route, or unlucky and getting killed by someone randomly. Look, if someone kills you off spawn is not necessary targeting. Maybe you had gear on, or they saw you had a good item and they just decided to kill you. Targeting would be people chasing you for a few minutes for no reason, or looking for you in servers and constantly going for you. Just being killed a few times off spawn is not targeting, there is a difference.
If you disguise, you shouldn't have a problem with this, maybe you are just unlucky.
Thread lock?