Someone give me a valid reason why witness statements for MIAs should not be in existence?

So out of 1548 people who have been killed, you're telling me no one would be around to witness it? Ever? In the entire country?

Not only are you still arguing to pretty much cost the game money in some way. You're getting away from it being realistic. 

Sorry that my "take a piss" example wasn't a strong enough argument. I'll be sure to comeback later with more examples, three paragraphs explaining them and so forth.

Someone give me a valid reason why witness statements for MIAs should not be in existence?

Squishy already handled the main reason for this, which is preventing paranoid leaders from using WS's to target people trying to train a gun secretly.

So out of 1548 people who have been killed, you're telling me no one would be around to witness it? Ever? In the entire country?

There's a lot of unrealistic elements of this game: flight times, currency amounts, drug types, and all sorts of this. Why is this the immersion breaking thing? Isn't it just as realistic to think that someone training up their skill as a shooter would practice out in the middle of nowhere?

Not only are you still arguing to pretty much cost the game money in some way. You're getting away from it being realistic. 

See previous discussion of realism.

Also, how is this costing the game money? Not sure you've come close to proving that. You can launch MIAs with credits (which you win or purchase) or you can launch them with game cash. It's not like credits are a special currency that you need to exchange money for. By being active in the lounge/the forums/earning game cash people can stockpile a decent amount of credits. If anything the ability to train on MIAs without sending out witness statements would seemingly make them more likely to invest real life cash into their accounts, since they know there's a greater chance that account would be purged/killed for being a threat.

Sorry that my "take a piss" example wasn't a strong enough argument. I'll be sure to comeback later with more examples, three paragraphs explaining them and so forth.

I love how you use "three paragraphs" here like it's some insane amount of writing. You don't need three paragraphs. You just need a good argument. For example:

I don't think MIAs should generate Witness Statements. 

- No WSs for MIAs makes it possible for people to train their guns secretly and having less concern about a paranoid leader preemptively purging them. This is healthy for the game, since it encourages people to invest in their accounts without fear of losing them.

- No WSs for MIAs also helps keep this place from turning too much into Google Spreadsheet Simulator Adventure and puts more focus on the actual game

- No WSs for MIAs additionally makes sure that leaders aren't sending a thousand spam mails asking for witness statements for people whose MIAs got stolen because they lack the attention span of a semi-dedicated goldfish.

In my opinion, those factors outweigh any benefit of adding WSs for every MIA.

Leaders still send out WS requests for Mia's though last I checked