You have to be very careful these days with pictures taken from a mobile phone. In addition to the picture, digital cameras record something called EXIF data which can include GPS location data (depending on the make/model of your phone). Some forums automatically strip the GPS location data from pictures when you load them but others, like this one does not. This means when you post pictures of your collection you are effectively telling the world the exact place you store them. Cut/paste the information to Google Earth or maps and you will get a detailed aerial and road view of your storage location and directions on how to get there.
Depending on your appetite for risk you may like me what to strip this data out before posting. I open pictures in Paint, save as a .PNG (which does not have the ability to hold GPS data) then save back to as a JPG. I have lobbied forums where I am a member, to change the options to strip out the data and most have.
I don't want to cause alarm, just provide some information that you may not be aware of, to facilitate choices.