Whenever I get someone asking gender within the first two lines, I say "both." 4/5 times promised an immediate disconnection. I actually held a meaningful conversation with the other one.
edit: had some omegling today, here's a snippet of one convo.
> You're now chatting with a random stranger. Say hi!
Stranger: asl?
You: every
Stranger: what
Stranger: every age sex location
You: all of them
Stranger: every age??
You: every
You: age
Stranger: some ages are better than others
You: this may be true
You: my right index finger is better than my ring finger at certain things
You: like lifting infants
You: i was once in a championship, you know
Stranger: what was it
You: an infant lifting championship