pls advise me with good reasons

[Baajikiil]

Well, luckily, death in a game is not real, so they actually might learn a lesson. It is much more likely, though, that they'll simply hate you for it, or are too dense (and used to hot tps) to even notice it was a deliberate move, and not just stupidity on your part.

Agreed. I personally have never killed anyone maliciously, but I can sympathize with the motivation. I simply ignore people who annoy me in game. It's not worth my energy/time to try to get back at them or to get upset myself.

In that case, maybe the better option is to find a game with a party in acts one to four. I know, it usually forfeits the purpos of an "act 1 quests" game if you join and hack away in act five, but a quick, polite question to the other players in the game can eradicate all doubt whether you are welcome (for the extra experience they also gain for another player in the game), or if you aren't (because a friend of theirs can't join because you filled up the last player slot, and the game is full).

Woah, you are going out of the way to be polite here. I *do* often join the low act questing games to level, but I just begin playing without asking if I'm welcome. They made a "public" game. If you want to restrict it to friends, use a password. If you want to limit people playing in higher acts, use level restrictions. If someone asks me without cursing, I'd certainly leave. But most of the time no words are exchanged at all. Though I do usually help other players with act bosses if asked (I refuse to rush people, but will often help them with the bosses if they can get there by themselves).

"Us public players" aren't all immature. Some of us can think, and even talk, and some of us can even talk in "proper English" (which is not my native language, so if parts of what I am saying here are ambiguous, please ask me to clarify).

I agree actually. I've always liked public games, and have found them much more maligned than they deserve. I've met plenty of people whom I can respect, and have a decent conversation with on West HCL. When I find a quality player, it's usually readily apparent. Quality players tend to gravitate to each other, and I have plenty of people on my friends list, all of whom were met in public games.

I do play hardcore only though, and in hardcore you need to accept a reality of public play: If you play enough public HC, you will be PKed, or simply killed by someone else's mistakes. I can deal with that; it is simply a game after all.
I'll allow the PKs and cheaters to have as little impact on my playing as possible.