How about adding a link to automatically "ignore" right off a post? It could be placed next to the "Complain" link. This would allow for fast and easy ignoring of trolls and new usernames and reduce the task of having to copy and paste and add the offender to the ignore list.
because then you may accidentally put someone on ignore when you meant to hit one of the other buttons. Now, if an ignore button with a confirmation, then it is interesting...
There's a much easier way to get someone on your ignore list. Wherever the offender has a post simply click their XYZ alias, that brings up the Profile page, then click "Add XYZ to your ignore list". Presto, you're done.