Does Tesco think we're stupid?

I really have nothing against Tesco. The people who deliver our online food shopping are cheerful beyond the call of duty.

But I'm not so keen on the 'offers' on the website. I mean, look at this:

Yes, the "Price Drop" brings the four tins of tuna down to the same price as the individual tins (above). But only if you buy them before July 3rd.

After that, you'll be giving Tesco an extra £2.99 for the privilege of buying four of them wrapped in a plastic wrapper with the words "Bigger Value" on it.

They didn't take any notice of my previous offering on this kind of thing either...