Designate a list of 'less safe' destinations for further screening isn't workable. You would need to fully segregate all passengers going to those destinations at all times. Stop screening passengers going to one destination and then someone wanting to sneak contraband through just buys a ticket for that destination and hands the item off to someone else once beyond security.
But on Lanzarote and the Canaries in general the Spanish authorities have been dealing with increased weapons, drugs, and people smuggling operations, so not everyone is going there on a jolly.