The problem is that, given the range of colour options available for viewing the forum, some colours are less effective than others for the purposes of masking text.
However, if you want to be really clever you can combine the glow and font colour functions (so long as they're the same colour in both cases). It's highlight-to-read, and should ensure that the text in question stays hidden on every background.
will give you this:
Your text here.
I can't see that in Flamingvixen, but I can in Internet Explorer. It shows up as slightly blurry red text. But if you change the 2 to a 9 [glow=red,9
,300] it is too blurry to read.
You can also change it to white [ glow=white,2,300 ][ color=white ] but in IE, that just looks like you've broken your monitor screen.
Ah, the joys of computing!