You accurately describe a colleague or neighbor for approximately 60% - 70% of the country. Increasingly you may find that people are very rude and ignorant of the fact that there are social & ethical boundaries that should not be crossed. Unfortunately there are many people who choose to act like arses when it comes to others but would NEVER stand for the same treatment they dish out. To determine if one falls into that last category, fling back the exact same treatment they dish out and witness their offense. Note they have no sympathies when dishing their ill behavior.
However, particularly if you are allowing someone new into your life or if someone you love (child, spouse, etc.) is, it is completely valid to state facts and habits that are easily proven or seen to avoid having criminals, drama queens, groupies and others with negative motives into your inner circle. This is ENTIRELY different from gossips and busy bodies because it is based on their (easily proven or seen) habits and facts. Stating facts about another person comes from a place of caring for yourself and your loved ones rather than a place of negativity such as being a nosy busy body.