How could I get a line ignored that includes a set string? The whole line should be ignored regardless of who types it.

on ^*:TEXT:$(*text to ignore here*):*: { haltdef }

I think that should do what you want

incase its colored he might wanna use
on ^*:TEXT:*:*: { if ($(*text to ignore here*) iswm $strip($1-)) { haltdef } }

A warning needs to go with yours and mine, that your only just stopping the "generic displaying" of the line, its not actually ignored as such, just not displayed.

example.
on ^*:TEXT:$(*text to ignore here*):*: { haltdef }
on *:TEXT:$(*text to ignore here*):*: { echo -a BLAH! $nick said $1- }

The post generic display of that text ON TEXT event well still trip for it.

Its quite hard to actually ignore a text as such, i use /debug /ignore and /timer to do it.

But as you said and i think your right a simple haltdef so it doesnt display is likely al he really needs.

Thanks guys.

But I must say that even after reading the help files a bit I don't really know how to use the script.

If you could just help me to get this script up and running it would be greatly appreciated.

Ok lets pretend the thing you want to ignore is the blue text (not the " ")

"i like mr blobby"

In mirc

click tools
click script editor
click file
click new
type in the bold text below
on ^*:TEXT:*:*: { if ($(*i like mr blobby*) iswm $strip($1-)) { haltdef } }
click ok
type in on the line you normally write text into a channel on the following bold text
/!remote on

you should now find that if someone ELSE says i like mr blobby you wont see it.

PS: remeber change the blue text to what you want (no , commas or if there is one simple use a ? in its place