Well I don't anymore. I went through when we moved house and through those suckers out! He had some with a best before date of before we had even met!
Once when we were at FIL's for a birthday or something, we mentioned the out of date spices and jars of Indian pickle in his cupboard (years out of date). He said we could go through them and sort the in date and out of date spices. We make one pile on the counter and the rest back in the cupboard. We asked him to take a look before we tossed them in case he really wanted to keep anything. He pointed to the (significantly smaller) group of spices in the cupboard and said 'oh, is that all that was out of date? not too shabby'. We then told him those in the cupboard were in date. It was the massive mountain of spices on the counter that was out of date. He took half the pile and put it in the cupboard.
We recently washed some of FIL's spice tubs. Some are the old old old (imagine old, then make it a bit older) Sainsbury's logo. Like from the 80s. DH was pretty sure they'd never been washed. They just get topped up with salt, masala and turmeric. They're plastic, so all stained with spices and food splatters.
Between that and the many other food safety transgressions committed by him and grand-FIL (they don't wash hands, never wash the kitchen counters and they happily store rat poison and cleaning chemicals near human food), I no longer eat food he cooks.