Not really. I don't want to have any kind of FB/Twitter/etc. account. I hate being forced to use it and that has kept me from using several apps/services
Two people out of (currently) 47 comments. The number of people using this technique is probably statistically significant (i know lots of my friends have multiple facebook accounts under pseudonyms for similar reasons).
My account is semi-fake, with a real pic and a few friends, but my birthday in 1920.
It's great, except for those annoying "Never too old for love" and "Mature Singles" ads.