If a ganker was out in deep space he would get very bored very quickly since there's virtually nobody out there to gank.
Why would a ganker spend hours or days traveling deep space looking for someone to grief?
Even if they targeted you, tracked you in EDSM and found you, they would have spent hours making hundreds of jumps just to maybe find one person for a few minutes of griefing.
BTW, you can keep your flight log on EDSM private if you're paranoid.
You can see from my signature that I'm not paranoid. If someone wants to find me, they are welcome. I normally fly in the Fleetcom private group.
In any case, since there's virtually no chance of running into anyone, there's really no reason to be in open and you get better screenshots when you're in solo.