Perhaps a definition of ad hominem might help: from the Latin, literallly "to the person"
1 : appealing to feelings or prejudices rather than intellect
2 : marked by an attack on an opponent's character rather than by an answer to the contentions made
I wouldn't say all of RFA's replies were ad hominem, he did attempt to refute the contention with another opinion that gangs preferred 9mm caliber weapons, although he may be referring to the 9mm UZI, rather than a little handgun like a Luger, Walther P38, or a Beretta. Perhaps he should expand on that in another thread... Now back to our regularly scheduled program!
In many areas of the country (mostly rural) it is perfectly legal to kill domesticated animals wandering on your property. Only indiginous species are afforded protection under the law. In my suburban Virginia neighborhood it is a Class 1 misdemeanor to discharge a firearm, punishable by confinement in jail (county) for not more than 12 months and a fine of not more than $2,500, either or both. That said, I could probably kill the neighbor's cat with a .22 without anyone even knowing I'd fired it, so the risk is pretty minimal unless I'm going to use a .38 or something with WAAY too much stopping power for a domestic cat. The super soaker has always worked fine for me though.