Some topics, while on-topic for the site, might not be suitable for all users. For example, at some point, you may not be keen on dream questions popping up in your feed. It's actually possible to ignore questions with this tag.
I'm posting this in case (a) users might not be aware that this is a feature; (b) it might help users have a better experience; and (c) another alternative to arguing in comments.
On the main site, hover over the tag with your cursor, which brings up this menu:
Click the star twice to turn it into a red cross:
(Clicking it once makes it a favourite; twice and it's ignored; and three times and it goes back to normal.)
By default, this will gray out those questions. To ignore the totally, go to your preferences page and click "Hide questions in your ignored tags":
Afterwards, questions with those tags are no longer displayed, and this pops up at the bottom of the front page: