I'm just going to restate this for anyone skimming this thread or the quoted bylaw text....
The bylaw in question specifically mentions airsoft guns, and therefore appears to attempt to locally override any other definition of "replica firearm".
Secondly, it specifically singles out public nuisance and disturbances as the motivation for this law.
If this is the way things are going to go, the airsoft community will have to act proactively instead of reactively.
I personally think the United Kingdom's UKARA / VCR system is a good model to follow, and should potentially be offered up as an alternative to an outright ban. Sticking our heads in the sand will just lead to copycat bylaws elsewhere.
Now you know