Sinvaders
No, being killed by someone killing people without RP reasons is not the problem (in fact, even intra-faction kill could make sense).
The problem is the degree of freedom given to players which allow them to not follow basic principles. (and for me gameplay should help the player to play his char the right way).
Not following basic principles? By saying that the problem is freedom, you blatantly attack what many consider a basic principle. I feel that the real problem is that some people don't like having their core beliefs insulted and demeaned the way they constantly are by those who refuse to respect those that play in any way other than strict fundamentalist adherence to lore while perma-tagged.
The right way? That sounds pretty self-entitled. Would you like me tell you how to do things, or would you feel the same way I do about it? How about if you just try respecting those who are different? I try to, but it's hard to respect those that want the world altered to punish me for simply not being exactly like them.
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Do not assume that you speak for all just because you are the loudest voice; there are many who disagree that simply have no desire to waste words on you.