When are the illegals going to be outlawed?

There's a big difference between legal and illegal holiday lets. The legal ones pay income taxes and tourist tax, and in order to maintain good ratings, they need to keep the properties clean and in good repair with a good set of amenities, and compete on the basis of quality rather than simply price. That's actually the attraction to holiday villas and fincas - it's for those seeking quality over price. And those are the tourists we want. The illegals ones don't pay income taxes or tourist tax, they're most often just an apartment in some urban area (where they're probably not able to be legal anyway), and there's not much incentive to keep them in quality condition, since they don't really receive ratings from the guests. The illegal ones obviously have to compete on the basis of price, so they're cheaper, but are far less likely to spend much to keep it in quality condition or provide decent amenities, and the guests that stay there really have little recourse if something goes wrong. But for the cheap seekers, it's a way to get a place to stay on the cheap, and they don't have to worry about whether they leave it in a mess or damage stuff or steal things, since the owner has little recourse against them for it (illegal owners won't put much of any value in their places anyway - only the bare minimum - because it'll get stolen or ruined anyway). So, yes, ditch the illegal ones. But don't throw the baby out with the bath water.