it works perfect,
there is no noticeable gain lost in toms,
I know it is not best practice, but best practice and what works are two different things many times,
nothing blows up, green smoke doesn't come out and when you say condenser mic preamps don't like being fed into each other, you are indeed correct,
but I have never heard the mics complain
Heck, if I could run all my Crown amps into one speaker cable and feed all the double 18 subs I would, and I would have fewer cables to wrap up during load-out,
but that would have consequences. Tying two condenser mics together when we are short of inputs has no consequences at all. OK I made my point..
the impedance police