The daisies are pretty, but a pain, klm...you just can't get rid of them once they're established unless you poison the whole lawn and start over! And probably the poison would kill the native stuff and the daisies would come up again!
Shasta daisies line the gravel roads around here, too.
The orange flowers are another non-native--orange hawkweed. Their saving grace is that the butterflies love them.