Final answer:
Signage, such as the one in question, likely warns against risky behaviors such as not protecting eyes and ears, not wearing helmets and safety belts, taking unnecessary risks, diving into shallow water, or using cell phones while driving.
Step-by-step explanation:
The sign in question likely advises the avoidance of one or more risky behaviors related to personal safety. Without viewing the specific sign, we can infer from the reference information that important messages on signs can include warnings to protect your eyes, prevent hearing damage, wear a safety helmet, and always use a safety belt in a vehicle. The reference also stresses the importance of not taking unnecessary risks, such as diving into shallow water, which can cause serious injuries, or performing dangerous stunts. Highlighting the importance of road safety, other advice includes driving within speed limits and not using a cellphone without an external antenna while driving.