Not really cracking down. My main advice, if anyone seems a little sketchy, even the slightest, don't take it. If anyone offers you food/drink, be very specific you want to know it's clean. Tell them you have an allergy, or a drug test soon, so they don't fool you into getting high. Also, you're in a god damn dessert. Drink LOOTTSS of water, especially if you're fucked up. Don't be afraid of the medics, they'll only help. Don't lie to them on what you took, don't say you don't know, don't say you "think someone slipped it to you," just be honest.