You may not loot PCs during DM events. If you’re concerned about a possible crash and subsequent item loss you can message the DM channel asking them to pick up the items.
Outside of that, in general if your PC would do it, it is okay. HOWEVER please consider the other player’s feelings; how do you feel after your PC dies? How much worse might you feel if their things were stolen? Would you still want to play Narfell? Perhaps even with a character who would happily steal someone’s entire worldly possessions you could find a reason for them to take only one key item – either a powerful one, or something kept for sentimental value that could cause the PC (but not the player) real distress.
In the case of picking up a dead party members items to insure that 1) they are not lost in a crash, and 2) they can be returned to the person once they are resurrected; the key to making sure there is no misinterpretation of your actions, communicate what you are doing to those around you.
If it’s your PC’s intent to loot a PC when there are other PCs in the area, use common sense. You may not walk over in stealth and start lifting weapons and armour since common sense dictates that this would be seen, regardless of engine limitations.
There are also possible alignment and RP repercussions, but since that is a choice of RP, it won’t be made into a rule, but handled on a case by case basis by the DMs.
While wishing to prevent a looter from making a grab and run you must still adhere to PVP rules.