Yeah 50% is legal on the front sides, 70% on the windshield, and you can paint your back windows black for all they care.
I had a LeSabre with 2% (yes, TWO percent) on the back windows and 20% on the front and never got hasseled, 20% back and 35% front on my 96 SE and when I got pulle dover the one time in it the cop didnt say boo about it. I did, however, get a tint tickek while driving my husbands truck, that had 5% back window tint and 20% side windows on a reg. cab pickup....
Im not too worried.