In Zevizim, is it acceptable to perform spells that influence another person's will? For example, making someone fall in love with you and binding them to you. Even if it's not ethical, is the decision ultimately left to the will of the witch? Is this kind of spell harmful?
Yes.
When you do something, you have to be sure that what you are doing is right.
Since you are Zevist, you should be guided by ethics:
https://templeofzeus.org/EthicsOftheGods.php
There are different situations in life, sometimes other people just leave you no other choice, or you are in very bad circumstances, when from the point of view of the Gods you can apply such techniques, which in normal situations would be unethical, but in your situation may be the only way out to survive and restore justice.
In matters of ethics, I also try to be guided by the sermons of the High Priestess Maxine regarding love and black magic, without certain restrictions, which are emphasized by new members who apparently did not read Maxine's sermons well.
Other people may not know your situation, including me.
You have to look at your situation from the perspective of the Ethics of the Gods.
https://templeofzeus.org/EthicsOftheGods.php and apply those methods that will be ethical in your situation.
Some people may not understand the complexity of your situation if you start describing it in detail, but you must remember that the Gods understand you. In any case, you should be guided by Ethics:
https://templeofzeus.org/EthicsOftheGods.php
It is especially funny to read when some newcomers and old members (who do not remember Maxine's sermons about karma and what karma is in general) write that the improper use of love magic destroys someone's life and there will supposedly be some consequences from the point of view of karma, while forgetting that such people for example, Alexander the Great, whom our Gods love very much, had to kill thousands of people in the war, if not more, and such people naturally did not suffer any consequences in terms of karma.
There are also people who are currently fighting on the frontline between Russia and Ukraine, sitting in a trench. Obviously, in order to survive and return to their families, soldiers on both sides have to kill other people, those who shoot at you and kill your comrades.
It is very easy to write about Ethics without considering these and other situations, but if you apply Ethics and use common sense in each situation, you understand how you should act so that you act ethically
https://templeofzeus.org/EthicsOftheGods.php