One might have thought that advertisers would be constantly alert to the possibility that their advertising, rather than inducing us to want and therefore to buy their product, might actually dissuade us from doing so.
Yet we don't have to think very hard to come up with television commercials that, in one way or another, lead us not only to suppress the sound but also to turn off the product that is being touted.
And it is relatively easy to identify those advertising techniques that are off-putting in this way.
There is, for instance, those ads that seem to appear at every commercial break - the opening scene of such repetitive selling efforts is enough to make one scream every time they appear. In our family, "not again!" is the usual response to this kind of blitzkrieg.
And then there are the ads that are selling products offered by different providers but that are all selling essentially the same product. This kind of advertising, for some strange reason, seems particularly prevalent when it comes to products thought to be of special interest to elderly viewers.
So, we have endless advertisements from different advertisers for what is called funeral expense insurance (which is, in reality, merely a small-scale form of life insurance); and there are similarly repetitive ads for stair lifts, hearing aids, retirement villages, and "sitting down" exercise machines, repeated examples of each of which can be found on television programmes scheduled for around lunchtime.
This is to say nothing of the advertising frenzy that we all had to endure late last year and that was apparently engendered by something called "Black Friday", a date which seemingly had no recognisable significance for us other than to produce an excuse for an advertising blitz.
Then there are the ads that go out of their way to irritate and annoy - those that employ super-excited voices or -"wait, there is more"! - voices that are deliberately (and insultingly) made to sound unpleasant in the misguided belief that people will identify with them more readily and therefore take their custom to one particular supermarket.
And there are some advertisers who apparently believe that their product can be made saleable only if supported by an American accent.
And I haven't even mentioned the constant attempt to persuade us that various forms of fast food are super-alluring and are essential to "having a good time" at any social or family or sporting gathering.
Advertising on television is not, one assumes, inexpensive. How long before advertisers wake up to the fact that much of it is actually off-putting. What is the point of producing and screening TV commercials at considerable cost if their effect is to associate the product being advertised, in the minds of viewers, with feelings of irritation and annoyance.
If we must have television commercials, let them at least be worth watching and listening to. Advertisers: Wake up, and try harder, and - if you expect advertising to work for you - learn to treat your viewers with more respect.