Re: ... a mammoth 2,000 olfactory receptor genes, ..."
it's impractical to use them for tracking or in airports for drug searches.
I disagree. Elephants are obviously larger, but then they don't actually need to go to the place where they're sniffing. If you put one between two security lanes, it can move its smelling device around, and so reach items at different angles and heights with ease.
In the case of tracking, they're even better. Why go foxhunting with a pack of hounds and a horse, when you can just take an elephant, which does both. I guess the elephant wouldn't be quite so good at jumping fences...
But then if you can't go over, you can always go through.
In fact we should replace police dogs and horses entirely with police elephants. They'd be much better for riot control, can do sniffing, as well as dealing with armed criminals. OK, they might not be able to delicately hold their knife-arm in their jaws (with the promise of more pain to come if you struggle). But on the other hand, once a few criminals have been stomped into a paste on the ground, the others will learn. Plus it cuts down on prison costs.
Also elephants wouldn't be endangered if every police force in the world had a few hundred of them.
I'm liking this more and more. Anyone want to join me in founding The Elephant Party? Our policies are elephants for the police, subsidised elephants for anyone who wants one, and replacing 50% of horse racing with elephant racing. Then we can have equal opportunities for fat jockeys, who still have a chance to win a race.