That is how I got DH to like a few names, too. Shared the ones I like, he was "eh." Waited a while, suggested some crappy names I knew he'd hate...and he would bring up the names I had mentioned before (the good ones). :)
It has been brought up a few times in the past on here and a few people try it. It is also fun to see people's reactions when you tell them the fake "names."
Ooh! I think I'm going to have to try that!
And MJ is right. I've seen several people mention that they're doing this or are going to. We plan to.
I learned my lesson quite a few years ago when I asked a friend of a friend if she had any names picked out for her LO. She gave me the most horrendous names I'd ever heard and realized that, yeah, it was totally not my business to ask. lol I've just always loved names and I was curious! Since then I've learned to never ask.
We're telling others that our name choices are Gertrude or Hortense and Igor.