@Sarah977 @Mark116
Ah, okay. I think that was lost in translation a bit.
In the UK, those are decorative cushions, not pillows. Pillows are what you sleep on and would normally be in a pillowcase, not a decorative sham (if there's a difference between a pillowcase and sham?).
So, I do have some decorative cushions, within moderation, which the guests can use or not. Some guests remove them from the bed and that's fine. Others use them and that's fine. I doubt anyone uses them to sleep on as there are plenty of full sized pillows for that, but they can be used to make yourself more comfortable sitting in bed, reading, watching TV, whatever. I have some on my own bed, including the large continental type ones which I have found so useful for this exact purpose as I have a wooden headboard.
I'm not going to get upset about guests using these extra cushions. Yes, they are decorative, but they can also be useful, e.g. a bolster cushion is there to bolster, not just look cute! If there's something you don't want guests to use, it's probably best not to put it on the bed, but that's just my opinion...