I also didn't notice this until today, but this is a great feature to prevent spam and malware. Usually I feel like my Twitter feed is filled with people and li

I also didn't notice this until today, but this is a great feature to prevent spam and malware. Usually I feel like my Twitter feed is filled with people and links that are moderately trustworthy, but that leaves everyone vulnerable to someone hijacking a twitter account using firesheep or something else.