That FAQ ruling says nothing about the effect of a range ruler touching bases. When measuring range, it follows a point to point rule. Shortest point to shortest point. If a range ruler is touching your targets base, then the point on the base and the point on the range ruler are the same.
I did ask for clarification from FFG but since I made that request I have had the opportunity to reread my rulebook and I found something that I had missed earlier.
Range Ruler page 9
"When the rules refer to a ship being 'at range 1-3', it means that the target's base must fall under any section of the range ruler."
For a target ship to be at range 3, its base must be overlapped by the range 3 section of the range ruler, barring any response from FFG that states if touching has any effect.