I'm still learning to drive & have my learner's permit so I have an excuse if I go over the speed limit :V Though honestly, I try to remain within the speed limit for good measure—especially since driving instructors can fail you if you go a few miles over.

Personally, I'm of the mindset that speed limits should be removed (along with cup holders in cars to prevent spillage/potential accidents from said spillage). Look at the Autobahn in Germany; not too many problems there. However, so long as they're around, I do think it is necessary speeding tickets be handed out. Of course, given how we'll probably all have cars that drive themselves within the next couple of decades (seriously, look at how well it's working for the Google Car—the only accidents it's had were caused by man), this will probably no longer be an issue...