I have a personal policy against obeying stupid laws.
That doesn't mean I go out of my way to disobey them, but I'm not going to pay extraordinary attention to obeying laws that make no sense. For example, I don't smoke weed, but if I did, I certainly wouldn't stay awake at night worrying about it and I'm not going to worry about my friends who enjoy a good joint now and then.
Speed limits--how many people honestly follow them to the letter? We all push it--5 mph over, 10 mph over, sometimes more if a radar detector's handy.
The embargo of Cuba--this is a royally stupid law. Even if you assume its goals are noble (I certainly don't), it hasn't come remotely close to accomplishing what it's supposed to. If the opportunity arose for me to visit Cuba again (I was there, legally, for a period in 1995), I wouldn't think twice about it.
I think there's a conceptual difference between outright civil disobedience--a mass disobeying of a law to make a statement--and not bothering to obey a law because it's silly or irritating. If you take the two examples above, speed limits are mostly disobeyed because it's convenient. There isn't a massive "repeal the speed limit" movement. Every once in a while, people do publicly go to Cuba as a violation of the embargo in order to defy a stupid, oppressive US policy.