With a Blogger blog involved, use of email, to communicate with people who you don't know, creates a security risk.
- A blog, supporting a web based product, may look more interesting to hackers. If it's worth publishing by the owner, it's worth stealing.
- If the owner uses email, to communicate with customers or distribute the product, some owners may casually use their Blogger account email - and make their Blogger account vulnerable to brute force account hacking.
- Some owners may even include password hints, in the blog content - making the hackers job easier.
- At minimum, a successfully stolen blog may be worth a ransom demand, since the blog likely has commercial value.