On the whole, I leave the tags on but I have removed two. The first was on my small mousseline chiffon lozange - there was no way to hide it - too sheer plus the tag made the scarf sag a bit as it's so light. The second one was a cashmere scarf bought in the sale, the tag was already half-off so I just removed it completely. In both cases, I didn't need to cut anything, I just worked at the thread very gently, there's no knot and I have kept the tags and even the thread that I removed, lol. My taste in scarves has changed over the years and I have sold a couple on ebay so I like to keep tags on 'just in case', also, it just feels wrong removing the tags, although I know people who think it's wrong to leave them on. I suspect they probably should be removed but I can't usually bring myself to do the deed.