[ralph]

It could be better bash, e.g. using [[ instead of [. Also,

    curl -s https://api.github.com/users/$2/events/public |
    grep "\"gravatar_id\":" |
    sed -e's/[,|"]//g' |
    head -n 1 |
    awk '{print $(NF)}'

can be

    curl -sS https://api.github.com/users/$2/events/public |
    sed -n '/"gravatar_id":/!d; s/",//; s/.*"//p; q'

and so on.

[hodgesmr]

Pull requests are always welcome :)