Is there becoming too many mexicans in the US?

I have nothing against mexicans! As long as they are legal! But where I live there is just more and more illegal people dropping in, and causing trouble. There is graffiti on the side of my house of the Mexican flag that were hiring people to paint over. Also they are always having party's and smoking and drinking their beers. I don't know what it is, but with the mexicans that came her LEGALLY, they are all sweet and friendly! But the illegal ones are just noise! AND THEY KEEP HAVING BABIES! our neighbor is pregnant with her 6th kid! And they keep on coming in our yard. Now people, I am not being racist. No one can choose what race they want to be. But my question is, are there too many illegals coming in now?