The article is about Laetiporus sulphureus. The article clearly states that amateur foragers mistakenly eat Laetiporus gilbertsonii and Laetiporus conifericola and experience gastrointestinal problems.
Any mushroom guide which encourages people to forage and acknowledges it has two alternate species which look similar but have unfortunate outcomes is skirting a disaster.
Sounds like it'll be a massive hit with late night kebab shops!
If it goes wrong you eat in the opposite direction ... nothing special. It's known from alcohol.