If someone wanted to do that in 1.3, it’s called Alchemy, the God of PvP.
It hasn’t been a problem yet, I don’t see why it would be a problem in the future, because that’s a culture issue, not a system issue.
I would more say it isnt a problem anymore... PVP was alot more common in the past. There is a reason in the 90s when I was a sarr I had 10 resist poisons.
That said I really dont see it making a massive comeback in the future either. Which is probably for the better.