Witnesses are more focused on demons than people are in other Christian groups, and that is because the WTS prints material from time to time describing experiences that are designed to arouse fear of demons in the minds of the rank and file. Other Christian groups are generally not as focused on demons (there are exceptions, of course) because the Bible does not encourage the fascination with demons seen among JWs.
In Scripture, Satan comes against believers by accusing them before God, by propagating false teaching and by tempting them. Nowhere in the Bible do demons attack believers by jumping out from behind bushes and yelling “boo.” Only in Watchtower publications (and some similar Christian fringe groups) do we read of demons attacking people through moving objects, voices, strange apparitions, and even physical attacks.
In fact, if the demons are attacking JWs in these ways, they're pretty stupid. My experience as a JW was that people who claimed to have had these experiences of demon attack almost always drew closer to the organization in an effort to counter the attacks. In 30 years as a JW, I never knew anyone who stopped being a JW so that the demons would leave them alone. If JWs did have the truth as they claim, the demons would have to be pretty dumb to attack them in that way, since it certainly didn’t accomplish the goal of making the JW fall away from the "truth."