As any 8 year old kid knows, they can strap a paintball gun or a tow rope to their PowerWheels jeep and have some fun. All your ideas can be done Ryan, the problem is there are already better ways to do the tasks that you are intending them for. For disabling enemy fighters for research and backwards engineering, Confed developed the leech missile and the BW developed the leech gun. These two weapons disrupt all electrical power to a ship, even with shields up (ie you don't have to batter down the shields to use them). This prevented the Kilrathi from firing weapons, running away, or blowing their own ships up (committing
zukara) rather than being captured, which all Kilrathi warriors would most likely do. Your paintball gun would do neither, all the systems on the fighter would still be active, therefore the pilot could still fly by sensors alone or do all of the above mentioned actions. In other words, leech guns/missiles are far superior to your paintball gun for disabling ships/taking prisoners.
As far back as WC1, some fighters have been equipped with tractor beams. This is far superior to a tow cable for bringing in disabled fighters for one major (and several minor) reason, you can control the object that is under the tractor beam. If you have a tow rope around a fighter and are skimming along at a few hundred kps and you need to stop suddenly, you can't . . . unless of course you don't mind a few dozen tons of fighter craft slamming into your ass at a few hundred kps. If you use a tractor beam, as you begin to deccelerate, the tractor beam (taking a guess at the physics involved here) becomes a repulsor beam, slowing the ship in conjunction with yours. Even if this isn't true, since you have control over direction, you don't have to tow the ship directly astern as you would in a tow cable arrangement, thereby allowing the ship to sail past you if you have to stop suddenly.
The stupidity part of your posts (and this just dealt with the weapons you have proposed, I'm not even gonna touch anything else) comes from the fact that if you were even the least bit familiar with WC, you would know this. This goes for your other views too, such as having Kilrathi prisoners convince others to defect or whatever other crap you proposed. There are very good reasons why your ideas are not feasible and ignoring everyones explainations as to why this is the case is a great way to get a big "stupid" brand put on your forehead.
I can't believe I just spent 20 minutes of my life typing this. I need a "stupid" brand too
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Edit: a whole crapload of people beat me to it
C-ya