IT TURNS out that the bin near The Herald's City office in London has been monitoring me.
This is not the work of a disgruntled interviewee with James Bond delusions or the representative of a certain Edinburgh publication trying to nick stories by hiding among the sandwich wrappers.
Rather, devices were fitted into a dozen bins in London's financial district that can log the media access control (MAC) addresses of individual smartphones.
No, I had never heard of a MAC address either. But it turns out these are identification codes carried by all devices that can connect to a network and can be obtained if it has its wireless internet turned on.
This allows the bin's masters to log my route, compare it to my previous excursions and even monitor the speed of my lumbering gait.
The "pods" that feature this technology are neat little boxes with slots for recycling your newspaper and screens interspersing the latest headlines with advertisements.
The first month of trials by Renew London, the company behind the bins, saw around a million devices picked up.
Kaveh Memari its chief executive said it has "stopped all trials in the meantime" after the City of London Corporation, which governs these streets, objected.
For my part, I am fairly relaxed about personal data,
Always wondered who enters those online competitions with tiny odds of a win? That's me.
I will do a 90-minute survey in return for a handful of loyalty points at a supermarket I never visit.
Name my first-born after your brand in return for a 20p-off coupon? I wouldn't rule it out.
This makes me wonder if there really is anything worse about a company knowing our physical footprints as opposed to, say, our digital ones.
One concern is what happens when the two merge. The worry is of a Minority Report-style future where as slightly podgier Tom Cruises we are besieged by adverts targeted specifically at us.
If a company finds from my movements that I buy my morning coffee from Cafe Nero, it could arrange for an advert to pop up exhorting "do try Pret".
As a flask-carrying skinflint, I see this as little threat.
But two things do bother me. One is the patchwork of information that can be built up. Monitors in a pub could surmise my gender from the toilet I visit. A MAC address could be paired with a supermarket loyalty card to reveal my name.
By monitoring MAC addresses, companies can work around this requirement for assent.
Perhaps the answer is not an outright ban but regulation. After all, the chances are that if you asked my permission and offered me a coupon I would let you follow me around town for as long as you liked.
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