UPDATE:
I am brining this up again because you guessed it, Meko is at it again, this time Handsome is in on it too.

Between the suggestions yous have posted before and trying to keep her inside she has actually behaved for quite some time, months & months. Then a couple weeks ago she started it again & nothing is working.

Handsome can NOT be an inside only cat, he will pee & poop out of the box, scratches things up, is aggressive to the other animals, etc.. etc..

We are however trying to keep Meko in and are actually doing an ok job at it. She'e VERY good at darting out the door under your feet and there's always a lot of people & pets going in & out, yet we've managed to keep her in for 4-5 consecutive days so far. She is NOT happy. But of course as the weather gets nicer the windows will be more open again. Meko can get out of screens, even the pet-proof ones that I posted about priviously.

I have talked with my neighbor, asked him if I bought a scat mat if he would be willing to put it on his trucks hood. Of course he said no. He said it probably wouldn't work, or it would scratch his truck (I even offered to buy a nice fleece blanket or the like to put under it) and he also said it is not his responsibility to put the mat on his truck every time he parks it. Which I have to admit he is correct on the last one, it is not his responsibility.

Now granted I have not actually caught her up there but he says he has multiple times. I think she was getting up there at night or when I am at work. I can not afford a viceo camera to tape it when I am not there, heck I can not afford much of anything lately.

I am afraid this is my last warning from this guy so this is my last chance. Does anyone have any more/different advice?

If worse comes to worse and I can NOT keep her inside only would it be mean of me to find a home for her? (VERY LAST step of course, she's my heart cat, the cat who got me to like cats). But I honestly do not know what else to do.