[mewpmewp2]

I'd prefer to just have it. Seems decently important for me privacy wise. I as a customer don't want others to be able to test whether I have signed up somewhere and also it is much better security wise and not leaking business data.

And most times, it is standard practice to hide sign ups, luckily.

[lmm]

If e.g. the service allows people to search for their friends by email address (and many do) then hiding the signup is meaningless.