I had blanked the page since a lot of it became outdated after or operators were added, but you can see some examples of how to achieve exactly that in the history:
https://ehwiki.org/index.php?title=Talk:My_...amp;oldid=59513So, assuming a tag filtering threshold set to 0 in your settings page and no other tag weights that might break it (other tag weights would need to be set to 0 for this to work if you want other watched tags as well)
Add m:scat to a tag set with a weight of -5.
Add f:scat to a tag set with a weight of -5.
Add m:low scat and f:low scat with a weight of +5 each.
So,
f:scat = -5, filtered
m:scat = -5, filtered
f:scat, m:scat = -10, filtered
f:scat, m:scat, m:low scat = -5, filtered
etc
while
f:scat + f:low scat = 0, not filtered
etc
Should only be weird tagging situations that should not exist (low tags require the normal version to also be tagged) that would not filter correctly.
Note: Some searches that produces 0 results (i.e., if you search for a hidden tag directly), will bypass the filters. So if you try filter scat but then do a search for f:scat$, the filter won't work, but any normal searches will work properly.
This will work for normal searches as well, but if you want it specifically for the watched page, you'll want to rework it around the watched threshold instead
Low presence tag filtering is probably common enough that I'll add those examples back at some pointâ„¢