A couple branch questions

1) git-branch -d <branchname> complains if <branchname> hasn't been
merged to HEAD. Shouldn't it really only complain if <branchname>
hasn't been merged into any local branch? i.e., as long as
<branchname> has been merged, why care to which branch?

2) Why does --track work only for remote tracking branches? I think it
would be useful for setting up topic branches. I've actually got this
alias setup, but maybe a --topic option for git-checkout and
git-branch would be useful to others (?):

topic = "!sh -c 'branch=$(git symbolic-ref HEAD); test -n \"$branch\" && git co -b \"$1\" && git config branch.\"$1\".merge \"$branch\" && git config branch.\"$1\".remote . && git config branch.\"$1\".rebase true' -"

j.