No, no, and no.
The "traditional" use for rocksalt in a shell is to get rid of trespassers on your property.
These days, though, if Homeowner pops interluder with rocksalt, interluder is very likely going to win a VERY large financial settlement from Homeowner, who very likely will also go to jail.
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Beware the man with the S&W .357 Mag.
Chances are he knows how to use it.
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