We all pay it.
It’s where you call up for service, then the service people treat you like the ‘average’ person (as they’ve been trained to do), if you are the ‘average’ person it’s great service, if you’re not, it’s not so good. And hey face it we’ve all been on both sides of the fence, knowing nothing at all, or knowing more than average.
You feel like you’re being treated like an idiot.
It’s not hard to fix, bring in customer profiling, last time this person called they already knew this OR just be more polite and diligent in your customer service, that way we don’t have to pay the idiot tax.
No one is average, so don’t treat all your customers as if they are.
(Note: Often the idiot tax annoys your more advanced (and often most valuable) customers, the very customers you should be looking after.)