This is such random advice. What threats are you defending against here?
"Wear gloves": Why? Are you thinking someone will pierce the veil of all these other precautions but then be stymied when they find a smashed laptop with no fingerprints on it?
"Sir, we followed him for a year, watched him buy a laptop and use it in a park, but when we recovered the laptop from the dumpster, there were no fingerprints on it!"
They find your smashed lappy in the dumpster. "Oh, look, his fingerprints are all over it". There is no national DNA database outside of the penal system (yet) so your dandruff won't do you in. But a print will, if you've ever done something that got you into NCIC.
The idea is not to foil people who suspect you, it's to to keep them from suspecting you in the first place. If you are a NSA targeted suspect and you did something naughty, you've already lost the game.
"Wear gloves": Why? Are you thinking someone will pierce the veil of all these other precautions but then be stymied when they find a smashed laptop with no fingerprints on it?
"Sir, we followed him for a year, watched him buy a laptop and use it in a park, but when we recovered the laptop from the dumpster, there were no fingerprints on it!"
"Curses, our plan is foiled!"