This is something I was discussing with a friend earlier today and thought I'd share it.
Life is hard enough as it is. No sense in making it more difficult. However, it is hardly true that doing any kind of magic will lead to attracting demons. One must specifically have demon conjuration in mind, or at least be doing spell work with harmful intent. This is why cursing someone or willing harm on them while employing magical means is ill advised. It opens the door for opportunistic entities which will cause further problems for the individual that they choose to target.