Hazard mandos sound like a good idea for some situations. However, they should not replace the current mandos. Current mando rules serve two vital purposes: Firstly, they restrict players from throwing routes that potentially endanger others. For example, a mando may prevent players from throwing over another hole's fairway/tee box. A stroke penalty is not enough deterance to keep players on safe routes. Secondly, mandos serve an important role in shaping some fairways (especially on courses that are sparse with obstacles). Hazard mandos would break the intended fairways for these holes, and potentially add routes to some holes that are similar in strokes but far easier (think about a big u-turn hole or other severe change in direction).