Aldi and I

I must confess to having a secret fascination with the German Discount Supermarket chain; ALDI.
The branch close to where i work looks more like something out of coldwar Russia than a modern supermarket, and it is full of products that at first glance looks like the brands you normally buy, yet the spelling is slightly different; Bacardi might be Wacardi etc.
They also occasionally sell weird appliances like chainsaws and hand powered flashlights and I am drawn to these objects like a moth to a flame.
Last week they were selling metal detectors and night vision goggles at some insanely low price.
For a moment I thought it sounded like a really good deal, but then the truth hit me:
It must be part of some Serial Killer Profiling Scheme.
The moment someone lines up at the counter in ALDI with, say a pair of night vision goggles, a roll of duct tape and some black bin liners, the salesperson hits an alarm button and a SWAT team
will overpower the individual, who will be taken into custody and never seen again.
What will they think of next?