... and I can safely say that I won't be using it to hunt again. (At least no pre-hero or with proper potions or allies, translucence, master locksmith etc...)

I teleported into cursed locked no-magic rooms 10 times over 190ish hours (Without mobs in them). I had 6 teleports to locked rooms with an badass aggro mob.

10ish teleports to the dragon tower ruins pre-40 (Most of the time I had a wand of return however, but still died from lag a few times.)

1 teleport to a certain lich in a locked room, got cursed asap and promptly died.

2 teleports straight into a deathtrap...

And add a bunch of inconvinient teleports that perhaps didn't kill me but caused me a bunch of trouble.

No, teleporting to hunt is NOT safe at all. But sure, if con isn't a problem or you're at hero. The risks are pretty small.