Do some people have more trouble with spirit meddlers from using the Lightworker Healing Protocol, because they are very sensitive to thoughts about darkness and become more vulnerable as a result?

This can happen and is a pitfall for healers in general, that many have been healers in other lifetimes and suffered greatly because of a backlash done to silence them. They will carry many trauma memories from lives of being imprisoned, tortured, and killed for being found out, they are working for the light and are using intuitive sensing and were thought to be agents of the devil, for example, or witches. Many such scourges have happened because of fear ginned up by the Extraterrestrial Alliance to purge society of the people still possessing an intuitive reach, even though this has been largely constrained by manipulation genetically of the divine human. Having such memories will make people easily triggered by doing something to take on the darkness directly in the current life, and this can cause an emotional episode and may lead to too great a stress to be tolerated. In such cases, the easiest thing is to give up the practice and allow others to do work on their behalf, or to get healing to repair the oversensitivity. It is usually simply the fact that fear is being generated because they are triggered by thoughts of working on the darkness—working with the demonic spirits. They may have had lifetimes where they were taught many dark and forbidding things about the power of Satan and the risks to all who take Satan on, and so forth. This is not a true threat. There are dark spirits and some with more power than others, but none are a match for the light, and one who works to remove them through a partnership with the divine, will have no trouble doing so provided they stand strong. So this work is not for the faint of heart, and those with too much emotional baggage are better off seeking some healing assistance first before they entertain working directly on dark beings.