Dortmunder dazzles pilots with laser pointer: How dangerous is that anyway?

Why is a laser pointer so dangerous? Has this "worst case" ever occurred? Are there cases that have already been tried in court? What does it look like from the pilot's point of view when a laser pointer is directed at a helicopter?What about the case mentioned at the beginning from Bergkommen, which was negotiated at the Kamen District Court? What happened and how did the case end?What threatens the 37-year-old man from Dortmund?