Digging too fast is lame

Tell me how long it takes you to read an article? I think it is based on how long the article is. Now I am sure you like know more about digging too fast is lame! I read that someone has to wait 10 hours after the last digg.

I think if you are going to hold a contest, you can limit on the digging per user this will not show up. What if the contest which wants you to digg every post?

Tell me what you think?