Running with locked diffs is a preference thing.. It can either help or hinder your drifting. the Paper/Blu-Tac/Poster putty methods are reversible... Hot glue isn't.
Since the Diffs are plastic, trying to re-heat hot glue can cause the diff casing to warp..

I do know some Ghetto drifters who have used Bubble gum to lock their Diffs with Sucess or though, they did have excessive ant problems when their Cars were on location and when stored at home...

So for my TT-01, the Rear diff is locked.. for my HPI Sprint 2 and my Hotbodies Cyclone S the Diffs are stock and they drift beautifully.