I honestly have stopped checking ice thickness lately as I head out. Was about to fish a spot in 60 fow that I just got to when an F350 w/plow drove by and another vehicle about 100 feet away from following. After they drove by I thought wow, that must mean there is a lot of ice here. Drilled a hole and there was about 7-8 inches of mixed ice. None of it was really black and 6-8″ of slush and 8-10″ of snow on top of that. 
I used a plowed path for a good ways to get out to my spot. They also used it. On my way back I noticed ridges forming through it with water oozing out. I hopped off and fought the slush in fear that it would open up more. Not sure if it was a ridge forming of from that truck but did not notice that on the way out.
Don’t assume the guy you see out there driving his truck around (with MA plates – ha ha
) is a thumbs up for you to test the ice with yours.
Be safe and remember no fish is worth your life.
Then come derby time I (still with a serious poker face) hit the lakes early with a steadfast plan to catch the winning fish. By sunday afternoon I realized that I had fun without winning. So ya, it was fun and next year I’m going to focus on that more and try to get more people out to share in the fun.
-Brian