Oh dear, not again.
Unfortunately, I wouldn't be able to use this friendly tip. If I were in a seat with so little seat pitch that a magazine would make the difference, then my knees would already be much stronger stoppers and would already be pressed firmly against the seat in front.
There are lots of things we "can" do, but shouldn't. Reclining into someone when it's just not possible for the entire flight including meal service is just such an example. The recline is there for when it's possible to do so, not as a God-given right to screw over all your fellow passengers.