We wanted to prevent automated bots from sending too many queries at once - that's why we kept the social login. If you are still concerned, you could authenticate with a fake Twitter or FB account or revoke the permissions after trying it out.
That seems to me to be a terrible and Byzantine solution to a very easily resolved problem. So easily resolved in fact that I question whether this is really the reason why or are you harvesting data for some other purpose?
I too never use my facebook or twitter logins for anything unless it's absolutely critical.