No Sense making Light of it. It’s a potential hazard on ANY Pellet Grill/Smoker for a variety of reasons that could have serious repercussions. More likely on cheaper brands with less quality electronics but you can find incidents reported, videos of High End Brands. It’s Something to be aware of on Pellet cookers and possibly take some precautions - like: running it on concrete or gravel or pavers away from the house, Not running it while sleeping, Not keeping pellets in the Hopper/auger tube for long periods of time or in Humid environments, keeping it clean, keeping the temp sensor rod thing clean, inspecting auger regularly, etc, etc...... just have to decide what -if any - precautions you want to do. Or you may decide the Risk - even if slight - is Not worth it to you to own a pellet cooker.........
I decided Not to buy One because I decided against the Cheap Ones and couldn’t afford the Better Ones - But Better Ones still pose the same risks although maybe to a lesser degree.
IMHO an insulated cabinet charcoal smoker is as Easy ( maybe Easier since it doesn’t rely on electricity) and Safer than a Pellet Grill.