Paella n. A saffron-flavored Spanish dish made with varying combinations of rice, vegetables, meat, chicken, and seafood originating in the town of Valencia. Hum...not exactly. As you see the element of surprise was missing in the definition. Not that I disapprove having paella at Las Ramblas, where you can enjoy the view and stretch your tired tourist legs under the effect of huge Sangrias served in "buckets", but an experimented native gourmet would say it is almost a sacrilege. Maybe this sort of parody was meant to warn innocent tourists, we will never know. If you want another angle, there you go.
See Barcelona Street Artist at Las Ramblas Picture on a Google Earth Map