I'm sure more field technicians (or installers) know the proper way to splice low-voltage wires. Unfortunately, as well-intentioned as they might be, often it's more expedient to just twist-tie the wires and put electrical tape over them.
The down side is that after a few years, the oxidation begins to menace the connection and create static, resistance, or even failure.
This puts money in my pocket as I'm the repair tech who has to find this problem and correct it.
Below, is an example of how a proper splice should look. These are di-electrict, crimp-on splicers (aka: Red heads).
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