How are people doing with multiple accounts these days?

I have two accounts (in two different countries with two different e-mail addresses). I am now looking for a way to set up at least one more account. However, the only way I can do it at the moment is via Avios, with an e-mail address that I am already using.

How likely is it that I will get away with using two accounts with the same e-mail address, redeeming to the same FFPs or hotel programs?