What's so bad about downvoting and ignoring? After all that should be quite satisfactorily on a personal level.
Negatively rated questions rarely get answers, and sometimes even the answers get downvoted too because the question is so bad it cannot be answered with a good answer anyway.
However in case someone wants to do the work and does the job for someone else and answers a low to zero effort question... do we really want to forbid this? This would be much more than just personally ignoring the question - it would mean forcing all others to ignore the question too which kind of takes the freedom away.
I know I wouldn't answer a question where I feel like only doing the job of the others but partially this is true for each question. You always do the job for others. It only has to be balanced in the long run.
So in summary: downvoting and ignoring seems to be about the right balance.
edit: Small addition. Surely someone can post a few question before a question ban takes place and not closing means more of these zero effort questions before a ban takes place, but other answers here said it already: such a close reason is highly subjective and will be misused for sure. So that's why I think you cannot do better and have to live with it. If you really don't like it, go there and downvote some answers.