I loved that too when I had enough posts to not have to do that any longer.
Finally got a new position.. I had no idea that I would no longer have to type in the CAPTCHAs and the "I kissed a ____ and I liked it," "_______ Dream," and "10+25=?"!! Yay, faster posting!
We used to have a big problem with spam bots here. The capchas for new members are to keep bots out. Some of the spam was offensive material (porn spam) which made it unsafe for our younger members. It was so bad for a while AKateisaKate disabled registration for new members for a while and the staff deleted hundreds of accounts.
If I had a nickel for every spam post I reported.