Ok, I did some research on fabri-tac glue, and because it's base is an acetone (which, If i remember correctly, is the cunjugate base of acetic acid), one way to weaken the bond formed by acetone and the denim fibers is introducing the conjugate acid (for example, white vinegar, which is 5% acetone). because acetone's affinity for it's conjugate acid is greater than for cotton, it just might do the trick. I think you can get solutions with 10% acetic acid at the pharmacy, but whether 5% or 10% acetic acid, dilute it with 2 parts water and test on an inconspicuous area for colorfastness.
Another way is to use isopropyl alcohol (70% alcohol). I tried this one briefly, and it made the dried up fabri-tac glue all gooey again. Then I spread cornmeal all over it (as an absorber), waited for it to dry into clumps, and then scraped the residue away (albeit gently) with a scouring pad. This seemed to work; however because I was impatient and didn't exactly wait for the alcohol to penetrate the glue stains and the cornmeal to absorb the glue, 'there was still a tad bit of glue residue left. I anticipate better results when done correctly.
If you're lazy (like me) and don't have time to make your concoction of glue remover, using a dry-cleaning solvent/dry cleaners might do it. Perchloroethylene, trichochloroethylene, and trichloroethane are three different thypes of cry-cleaning solvents most commonly used. I'm not really knowledgeable about the differences among these agents, but I presume a good dry cleaners does.
There are more ways to get rid of glue...and I will be posting more shortly. I've only tried the alcohol version. Will try more in the upcoming days.
p.s. I am not a nerd. I just kept all of my chem books and notes.