I am glad you have taken interest in this cause most newly out guys do not. And it seems like most people have even forgotten the lessons of Anita Bryant's "save our children" campaign:http://en.wikipedia.org/wiki/Save_Our_Children
You get a play by play of the current anti-gay movement from them.
As far as laws that people broke, there were lots of laws that were used in states to persecute gays. Mostly they were laws such as "public decency" but also the obvious things like sex or sodomy laws. But some of these laws denied gays the simple constitutional right to gather through other means:
http://gaytoday.com/wordpress/index.php/2009/10/01/gay-bar-raids-a-double-standard-at-work/As long as gay, lesbian, bisexual and transgender people gathered together in urban areas, there have been gay bars. And as long as there have been gay bars, there have been bar raids. Since the beginning, governments have used their power to regulate businesses that sell liquor to go after sexual or gender minorities who they considered to be sick, immoral and/or illegal
In the case of Milk and Anita Bryant, she was going around knocking down and outlawing any anti-discrimination laws and even further want to make it illegal for gays to work in schools or EVEN non-gay people who supported gay rights.
The ultimate goal of people like Anita Bryant and the current anti-marriage NOM people is to remove any sense of "Normalcy" for gays and undo any pro-gay laws. In other words they want gays to suffer enough to be forced "not to be gay" In the extreme, other people in the religious arena have gone as far as wanting to make homosexuality illegal again. This is historically how gays are "officially" persecuted. Pass laws against them so that they can be randomly picked up, or even rounded up en mass.
To go along with the milk movie, watch this really good documentary about the whole Harvey Milk incident ... http://www.hulu.com/watch/49577/the-times-of-harvey-milk
It is about 2 hrs long but worth it.
Here is some other other links about anti-gay laws and gay rights by territory:http://law.jrank.org/pages/18653/Homosexuality-Law.htmlhttp://en.wikipedia.org/wiki/LGBT_rights_by_country_or_territory
To see how simple anti-gay laws become much bigger issues .. see the documentary "paragraph 175"