Preventing these bots...

I was thinking that we should really have a confirmation picture before letting posts be made. For example, every time I want to submit a post, it shows a picture of 5 random letters and I have to type them correctly to have the post submitted. They have these on quite a few websites and it prevents bots...for the most part. I hated using these all the time at first but they did come to be helpful later.

Konnichiwa! Thank you for your suggestion concerning how to prevent bots. I will pass this information on to our Rocket language master minders! :D Arigato gozaimasu!