For the most part, yes. I think it would also be acceptable to discuss fake strawberry seeds and other seeds where the picture has been photoshopped to show a fake colour.

The thing with the rainbow rose seeds, what 99.9% of sellers don't tell you is, they don't actually grow that way, you have to make them coloured yourself. What you get sent is a certain type of rose that gives the best effect for the colours (although most white roses will work). You have to split the stem at the bottom and then submerge each split stem in dyed water and the rose absorbs it up turning the petals different colours. We used to make blue ones years ago for mothers who had baby boys.

If the sellers told you this in the listing, there wouldn't be all these issues. I found 2 sellers in Hong Kong who actually tell the truth. The other sellers get away with it because by the time the rose seeds grow (if they do in fact grow), it can be a few years before you get a flower and a few years before you realise that you have actually bought a light cream rose, not a coloured one. By then, there's jack you can do about it.