I do this and it keeps my main inbox nice and clean. In the case where I have to reply, Google allow you to set up a from email which you can use from your spa

I do this and it keeps my main inbox nice and clean. In the case where I have to reply, Google allow you to set up a from email which you can use from your spam trap account. So if you need to send an email as banana@domain.com it's a few clicks away