I think I inadvertently broke the same rules alluded to in the article, i.e. I have a small personal project where I mapped the buildings from my Eastern European city which used to be owned by Jewish people before they had been nationalized by the newly-arrived communists in 1948. I use Google Maps for displaying said buildings, and in order to "identify" a name as being Jewish I compared the names of the owners from the nationalization law to the entries from yadvashem.org (given enough matches for a certain name it meant that said person was Jewish).
Now, I didn't do this because I hate Jews, on the contrary, I did it because I am saddened by the loss of the Jewish cultural element from my city (they used to comprise around 10-12% of the city population before WW2, most of them emigrated to Israel by the late 1960s), and wanted to sort of make their presence felt again.
I also wanted to, at some point, map on Google Maps the Jewish cemeteries from my part of the country, which are almost all of them being forgotten and not taken care of (seeing as a former Jewish presence of around ~700,000 in the 1930s now only numbers ~3,000). But this article makes me think twice. What if someone thinks I would do that only for some Nazi-group to have a better target?