When I'm looking at the list of topics inside a forum, can I choose to hide the tags? 

I searched the ACP but couldn't find it. 

There is no way in which to hide tags using settings, no. This would require customisation

Ok thank you, I suppose it shouldn't be too hard to hide them with the right CSS selector, I just have to find the right one. 🙂 

Ok I tried this and it seems to be working! 🙂

body[data-pageapp="forums"][data-pagemodule="forums"][data-pagecontroller="forums"] .ipsTag {
	display:none;
}

So it tuns out that this previous code would still display "3 more" for example for posts having more tags that couldn't be displayed. 

This is the better CSS selector to hide the entire list of tags: 

/* Hide tags on topic list */
body[data-pageapp="forums"][data-pagemodule="forums"][data-pagecontroller="forums"] ul.ipsTags {
	display:none;
}