Which of the following is NOT listed as an indication for protective gear?

The choice of casual social gatherings as not being an indication for protective gear is correct because protective gear is specifically meant for situations that involve potential hazards to health or safety. The other mentioned scenarios—actual or suspended HAZMAT events, incidents on roadways or freeways, and working with aircraft—are all environments where risks such as exposure to dangerous materials, high-speed traffic, and aerospace-related hazards are present. In such cases, protective gear is critical to ensure the safety of individuals, as these settings can involve risks of injury, contamination, or other serious hazards. Conversely, casual social gatherings do not typically present such dangers and hence do not necessitate the use of protective gear.