I have not been tagged yet.  However, I haven't been to many 'hot spots'.  What does this mean?  Hot spots around here, are typically in NYC.  These hot spots have several security cameras and devices post 9/11.  These typical areas are highly congested such as; under bridges, near entry ways, tunnels, train stations, national landmarks, and tourist areas.  I was recently in Grand Central Terminal Station; this is designated as a hot spot.  I did not have a tripod-although they are allowed here with limited use, extended use requires a permit.  If I had a tripod today, I would have been tagged, more than likely.   There are many photographers in Grand Central Terminal, but with iPhones.  I have not been tagged by local officials-whereas, they do not want you to take numerous detailed photos of these structures.  This is understandable.  Using discretion, and letting people know in advance what I am doing helps me a lot.  Not in all cases, does this work.  However; today it did.