CHAdeMO is compatible w/vehicles other than Nissans. See below (the C Zero and iON are rebadged i-MiEV and doing much better in Europe than the i-MiEV is doing here inthe US).
Nissan LEAF
Citroen C-Zero
Mitsubishi i-MiEV
Mitsubishi Outlander PHEV
Peugeot iON
Nissan e-NV200
Citroen Berlingo
Peugeot Partner
Honda Fit EV (US version doesn't have it but JDM version appears to given http://world.honda.com/news/2012/4120831Lease-Sales-Fit-EV-Japan/photo/pages/08.html and http://world.honda.com/news/2012/4120831Lease-Sales-Fit-EV-Japan/index.html)
Soon, the Model S will be compatible too via http://shop.teslamotors.com/products/chademo-adapter. As we've said, the above vehicles make up an installed base of ~200K vehicles.
It's not the same, they're not compatible, at least not for now.
It does matter. More charging standards (esp. from those who aren't serious about EVs) does not help w/EV adoption. Consumer confusion doesn't help either.
Frankenplug is a term that's been used WAY before ANY Frankenplug vehicles were shipping. Who cares about an "industry standard specification" that's years late and years behind while being virtually worthless for the time being w/no serious backers (as in, not serious about DC FC) other than BMW, which doesn't even have a DC FC capable vehicles shipping in the US yet?
And, this "industry standard specification" isn't even a world standard. In Europe, due their apparent wide use of Mennekes instead of J1772, their Frankenplug is different and not physically compatibele w/US Frankenplug. See Combo2 at http://www.mychevysparkev.com/forum/viewtopic.php?p=5012#p5012.
Then you should report them to security. If there's proper signage, you can get those folks ticketed per AB 475. (I don't recall all the details about required signage. I'd have to find the proper MNL thread.) You can also leave them notes like the ones at http://www.plugincars.com/blink-offers-three-printable-notices-iced-plug-vehicles-125068.html. I've done this at work for ICEVs that have blocked our charging spots.
It is unfortunate about the way AB 475 was passed w/crap the GM slipped in (http://www.greencarreports.com/news/1065314_gm-riles-ca-electric-car-world-again-over-ab475-charger-sharing-ban). Chelsea Sexton wasn't thrilled about it: https://twitter.com/evchels/status/105786745332842496.
