Sadly photographers often get hassled if they take photographs in public. At least, the do in the UK. It got so bad the Met police had tonissue guidelines to their officers about why it's okay for people to take photographs in public. http://content.met.police.uk/Site/photographyadvice that advice is written from the lerspective of the Police. It doesn't mention the extra protection given to journalistic material for example.
So, while it's not going to get you shot using a Hack-DSLR might get you arrested.
I've been "harassed" a few times over seas. Usually it involves accidently photographing near police stations or military installations, which is a pretty obvious no-no, except that the buildings were pretty non-descript and I had no idea what they were at the time.
It's only happened a few times: someone comes out and either tells me to stop, or yells at me in a language I don't speak very well, and I say "sorry" in whatever language and continue walking around.
I find that the trouble happens when photographers/travelers try to argue with the people harassing them.
Usually most the people I encounter just make a joke, smile, and encourage me to take photos.
Funny how far a smile gets you when you're traveling.
So, while it's not going to get you shot using a Hack-DSLR might get you arrested.