geocities.yahoo.comは安全ですか？

It's an intuitive website builder, however be sure to read their terms of use, as they are very picky. They deleted three websites that I personally made. If you put any google things such as a google custom search, they will likely delete it. If when making your account, you make a name or address that sounds phoney, they will delete your website. There are other various reasons that leads them to delete your website. And, they give you NO notice! Also, five megabytes of bandwidth, which is all they give to free websites, will not let you view more than a few images before crashing. I would not recommend this service.