I am still waiting for these interdictions whilst in FSS/DSS mode and I have been exploring since Beta dropped. I will admit I have been interdicted a total of 3 times whilst in the 'naughty' screens, twice by System Authority - just dropped out of SC, waited 15 seconds and re-entered SC and continued my scans. The only other one was a NPC pirate, but since I didn't have cargo I wasn't overly concerned. I still had enough time to exit the FSS, change to Combat Mode, and beat the interdiction easily. In fact I have been interdicted many more times after exiting the FSS screen, normally either after scooping or on my way to map a body, but to me that is just normal.
Maybe if I was flying deep in the bubble I might experience more, and yes I am in Open before you say something - but once I get outside the bubble I rarely see another ship much less get interdicted. To be honest, even if I did get interdicted and destroyed, it wouldn't bother me too much, it is the same as running a Elite haulage mission where I know someone will come after me, it is just a facet of the game.