Wow, yes that would be annoying! It's unfortunate as its great to have a friend who you can share ideas with, bounce things off of etc!

I had a provider once use my ad almost word for word. She called her daycare something very similar to mine as well. Luckily my daycare name is registered. Also working in the law field prior to daycare I knew she could not use a name so similar. I contacted her asking if her name was registered as mine was and I would like to see the approval she got to use that name. She didn't reply back but immediately deleted her ad.