I do not own a laser yet, but will very soon.
I want to get the new 7 watt system that Phil has.
And the smoke will be vented directly to the outside and not through my duct collector.
When the dust collector is running there is a definite cloud of dust swirling around in there.
And yes, sawdust is very explosive.
In your own words"Yes, something could go wrong and the laser could start a fire that could be sucked into the dust system"
There is zero chance that I would do it.
I do however plan to use the same hose coming off of the dust boot.
The difference being is that I would simply disconnect it from the dust collector and move it to the separate outside blower that will be mounted to the wall. (simple enough right?)