I'm very used to this sort of thing from a broad miniature war game standpoint. If I might toss my own disposable opinion into the heap, I think this is just something that goes away after getting used to playing games where there's no "grid" or "map" or other hard measurement mechanic in place to tell players how far they can move/shoot/etc. I'm not saying that there are no cheaters. I'm saying I grew more comfortable with managing these situations over the years.
Say I want to tie up as many squadrons with my single squadron as possible. I'll set it down and then measure, with my opponent watching, stating "it looks to me like x, y, and z are engaged". Later on, when he/she tries to move the squadron away, I'll gently remind him/her that we'd already cleared that up and some sort of accident must have occurred to bump the squadron out of place.
Of course, this can't solve every issue, but I think in general playing these miniature war games is an extremely cooperative experience. You should move and position your units while communicating with your opponent and expressing your intent. These cheating concerns really only come up when one player or the other was trying to be secretive about something. Ultimately, there's absolutely nothing wrong with saying, "Would you mind double checking that the maneuver tool is properly situated before you pick that ship up," and there's nothing wrong with responding, "sure, please come check before I pick it up that it's in there appropriately".
Except, maybe include as many lame Star Wars movie quotes and references while you're doing it, too. That'll go a long way. My main opponent Dano generally agrees that it feels better to lose a ship to enemy fire if the opponent is "pew pew pew"ing while the dice are rolled.