Storm chasing is often something that is glamourized by Hollywood. It is seen as very adventurous and even heroic and while this may be the case sometimes, more often than not it is a dangerous past-time that has gotten many people injured and even killed. There are many inherent dangers to storm chasing and even professional meteorologists and scientists are injured and killed doing this. The most obvious danger is the possibility of catching the tornado you are chasing (or more likely being caught by the tornado you are chasing). The majority of chasing is done in rural areas which means there are few places in which to seek shelter other than a ditch or culvert, neither of which are very safe. Another danger that chasers face is lightning. Many chasers are out in remote areas with little else around them, making them the tallest objects and a good electrical conductor. Flooding can also be a major risk for those out in the field. It's easy to underestimate the amount of water on a roadway when you are trying to chase or frantically trying to outrun a storm, and it only takes a few inches of water to wash away a vehicle. Hail and dangerously high winds are also a threat to chasers as they can smash windshields and toss or overturn vehicles.
More recently in some instances, hobby chasers have become a danger to others in the community as well as themselves. There have been several occurrences where hobby chasers with no training have gotten themselves into trouble by getting caught in the storm and needing assistance from law enforcement, emergency medical services, etc, potentially putting these people now in harm's way and/or wasting resources needed by a community just devastated by a storm. Amateurs looking for a thrill or cool photo opportunity have been known to clog roadways, obstructing roads for EMS, law enforcement, utility companies, etc hindering their work and potentially harming others as well. For these and other reasons, it has always been strongly recommended that amateur chasers stay home and seek shelter during a tornado and leave the chasing if there is any to the professionally trained scientists.